XP in Minecraft is Super WEIRD...

Back from vacation with a quick deep dive into some of the weird and unintuitive dynamics of XP in Minecraft.
Links:
@whitestonejazz - Math discussion -- GREAT math based MC creator.
@silnarm - Code discussion and generally awesome dude.
@JustGlotz - Kill Chamber that kills excess orbs - • How to make the FASTES...
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As always feel free to comment if you have any questions
#Redstone #Minecraft #Nico

[@NicoisLOST]

*One clarification:* With pillagers (or any mob who holds their weapon) the extra XP for holding a weapon is not added if they dropped that weapon when killed, so if a pillager drops their crossbow they drop only 5 XP. The video simplifies it a bit, in the actual game 8.5% of the time pillagers drop only 5 XP (3,1,1) which makes the average orb size calculation more complicated than I decided to include in the video. All of these dynamics also apply to armor also (the armor bonus is on/off, not additive).

[@N0ark.]

hey Nico! one question, do you happen to know the theoretical best mob for grinding XP with this in mind? one that is farmable that is.

[@AnimilesYT]

So a looting sword is not desirable for pillager farms?

[@Mythlorrr]

There is a video by cubicmetre from about a year ago called "The Quest for Minecrafts God Particle" where he explains a possible reason why those numbers where chosen for XP. He starts explaining it at 5:17 in the video. The reason that he gives is that with this set of numbers you can access every number possible, while from a game design standpoint it still looks natural.

[@NicoisLOST]

@@AnimilesYT Yeah you're right actually, so in the pillager farm it is undesirable. It's not such a small impact though so it's probably not like.. that big a deal.

[@NicoisLOST]

​@@N0ark.I guess it matters. Outside the dragon or wither I guess a ravager with 10 xp per orb average, no penalty or gain for over-absorption rate farms, 360,000 XP/hr.

[@PasiFourmyle]

I wonder if there's a reason they didn't just literally merge xp orbs. It just seems so weird to me to have so much going on behind the scenes that at first glance only seem to serve as limits to the player.

[@poppinlochnesshopster3249]

They don't seem to like fun. Notice how desperately they try to nerf update suppression and light suppression, even though it's a bug that no one will ever run into accidentally, and is only done as _extreme_ endgame content.

[@xxthelinkxx3296]

Look at how they slaughtered villagers

[@fireninja8250]

​@@xxthelinkxx3296 I feel that was justified though Villagers skipped 90% of the game, and after that there was nothing to do to progress

[@DxBlack]

@@fireninja8250 Yeah, but they skipped the worst parts of the game...if you want to try getting certain enchants you now have to hunt down a biome that could very well not have a village and usually is hundreds of thousands of blocks away depending on rarity. If you hadn't gone for an Elytra AND already had Mending on it, it's a PITA.

[@cartoonistanonymous]

Agreed, in my 2000+ day world I still haven't come across a swamp and I don't look forward to either dragging villagers to one once I break down and use chunkbase, or else going fishing in minecraft for another 2000+ days. They could at least up it's chances with fishing/looting chests, by the time I get enough ancient debris all my godtier equipment is busted, it's undoubtedly a pain in the gluteus region.

[@Jeracraft]

I now have a PHD in Minecraft XP orbs, thank you!

[@indovash]

I understood nothing in this video except, "make good enderman farm or place down a cactus". But I will say this, I felt very smart while listening to Nico explaining everything. Once the video ended, I forget everything except for "cactus stops orb clustering".

[@theophiled]

The xp you get when you kill a mob is split in orbs based on a mathematical formula, where you can get low value xp orb or higher value xp orb. Mobs with a weapon/armor will drop more low value orbs. After a while, orbs will despawn if not picked up by a player. When there is a lot of orbs, to prevent lag the orbs have a chance to merge into a stack of orbs. The "age" of the stack of orbs is set by the latest orb added, so the stack will never despawn if it keeps merging with other orbs. This is important because the player can only absorb a maximum amount of orb/hour, regardless of the orb value. As I understand it, a stack does not count as one orb, each orb of the stack is still counted as individual orbs. Therefore, to be efficient, you want to absorb higher orb value instead of lower orb value. If your farm produces a lot of low value orbs (like a pillager farms), they will merge and you will get a lot of low values xp orb that won't despawn. Thus, to optimize this kind of farm you either need to lower the orb production rate to reduce merging, or delete the orbs stacks with a cactus, fire or lava.

[@josardoleon6894]

Exp merging on an enderman farm makes it more likely to pick higher valued orbs, merging on a pillager farm makes it more likely to pick lower valued orbs. So, merging exp on enderman good, merging on pillager farm bad

[@michaelc754]

Bro it’s was basic math for the most part. Elementary school level or I guess middle school level in some red states

[@codacode3623]

Pillager -> merge bad -> place cactus Enderman -> merge good -> do nothing

[@Nunes_Caio]

I've played minecraft for almost 10 years of my life and I had no idea you could literally burn XP orbs, like, what did I miss?!

[@AdawaShiwani]

I learned pretty early around 2013

[@LuigiCotocea]

Brother didn't you know that xp also despawns since counts as entities!

[@leow.2162]

I learned that when I thought I was clever for just burning down one of those houses in the forest and ended up burning half the forest and myself

[@aquss33]

Xp orbs often fall in lava, they do be kinda funny lol

[@blablabla7796]

@@AdawaShiwanithis sounds like it comes with a sad story involving lots of experience and a form of fire based death. 👀

[@MegaChickenfish]

The sheer under the hood madness to build this helps explain why Minecraft accumulates so many bugs over the years, especially trying to adapt to other platforms. "OK, now to rewrite the xp system as similarly as possible.... _you did what?! Why?_ "

[@aiocafea]

certified 'the gods must be crazy' moment this feels like lifting up the veil to see a carrot on a stick that powers minecraft to run i have seen botch-jobs in the minecraft code before but this made me realise these duct-taped walls may hold up more of the game than i had previously thought

[@CraftyMasterman]

im loving this really awesome math approach to tmc concepts! good stuff 👍👍👍

[@toastjacky5653]

Wait Crafty!

[@RubusCalculum]

You have excellent taste in content

[@NicoisLOST]

Glad you're enjoying it :-]

[@thecowboyfromcali]

Another KZbinr named CubicMetre does a pretty cool deep dive on a lot of technical stuff like this. One of his most recent endeavors, is looking at how to get the most XP per hour in a theoretically achievable way. So he created a system using furnaces and update suppression, to constantly get "God Particles" or the TOP amount of XP you can get in a single orb. Because it is using update suppression, inherently a bug, it is hard for the average player to grasp how it works, or to recreate it themselves. It also will probably get patched or fixed in future updates as time goes on, but other methods will arise.

[@willparkin]

I think zedaph did this in hermit craft with no "cheats". pure vanilla. I think it was smelting then 1 TNT if I remember correctly

[@la1m1e]

It got fixed like month ago in 1.20.2 snapshot

[@AndrewBrownK]

when the fastest xp farm has to literally throw xp in the trash in order to keep up its speed

[@SupersuMC]

"There are a bunch of ways to get XP: Production of goods, murder, exploitation, and destruction are the main ways." So basically capitalism.

[@unapproved-apples809]

Colonialism 2 Electric Boogaloo

[@ThatDawgInEm]

Sounds like more of the effect of communism.

[@ad89590]

Opposed to communism which is murder, exploitation, and destruction.

[@MvMArcher]

It would be interesting if we could manipulate the exp orbs, effectively filtering out lower value orbs, but I'm guessing that the hitbox of orbs doesn't increase in size with the size/value of the orb?

[@greengargoyle4660]

I'd be interested in whether we can use the grouping mechanic to pull out orbs of a certain size. That's assuming that the orbs will snap into stacks the same way items do

[@leow.2162]

Maybe something where you spawn the first bunch of xp "manually" until you have the orbs where you want them and then activate the farm so they fill up the stacks where you want them

[@kimheng541]

This is harder than quantum physics.

[@dzuchun]

as a 3rd year student, I can assure you - it's not, unfortunately

[@danisob3633]

@@dzuchun as a non-student, anyone can assure that

[@milesdsy]

@@danisob3633as anyone, I assure you that math isnt real

[@jc_art_]

​@@milesdsyas a single peice of you, i can say youre wrong, but only mostly

[@unapproved-apples809]

​@@jc_art_as a single carbon atom in that piece, na he's right

[@klaasdepaashaasmrhaas]

This is one of the most interesting videos I've ever seen. Such a small topic, never encountered anywhere except maybe in scicraft, but just so well explained with exactly the right level of detail and research!

[@anoukk_]

2:31 it just takes the closest prime with a priority for the higher prime if they are at the same distance.

[@NicoisLOST]

I thought this too, but it doesn't hold up. For instance: 149 * 2 + 1 = 299, nearest primes: 293 (-6), 307 (=8), They picked 307. My anal retentiveness really wanted to find a set pattern but failed :-P

[@FutureThrone795]

@@NicoisLOST "anal retentiveness"? D:

[@MarvelousButter]

@@NicoisLOST >My anal retentiveness Your what now?

[@NoNameAtAll2]

​@@NicoisLOSTdid you run your python script over these "corrected" sets of primes? (for either rule) maybe something weird happens with different orb size choices

[@miacalimontez]

Is 13 a prime number? It chooses 17 over 13 despite 13 being closer.

[@mal9369]

Kind of hilarious that to optimize xp gain, you must destroy xp so as to prevent merging

[@ShadowBulb]

I love that you posted this on a weekend that way i dont have other stuff to do

[@sossololpipi9633]

i love how minecraft just feels the need to make every other mechanic randomly complicated when it absolutely does not need to be

[@Andreyy98]

For the 2n+1 formula for orb sizes. I remember from algorithms class I had there is an algorithm that finds the minimal number of coins a1, a2, ... required to return a value N. Lets say we have N = 7, a1 =1, a2 = 3, then the minimal number of coins to do 7 is: 2*a2 + 1*a1 (3 coins). The algorithm is complex and requires dynamic optimization I'm not going to in depth, but the interesting thing is that if 2*a1 < a2 and 2*a2 < a3 etc. there is a greedy algorithm (no brainer algorithm) to calculate how many of which coins to return. I suspect that is the reason why 2*a1 +1 ~ a2 and so on. On the reason why they are prime I suspect that we want the orbs to be relatively prime. I'm not 100% sure why, but may be some kind of optimization of the number of orbs to be used. This is not a complete answer but rather insights why those numbers could be picked.

[@Linkario]

I clicked to understand XP, stayed for the very clean graphical design used to explain your results! Simple, pleasant to watch and gets the idea across well. Thanks!

[@redbot1233]

This deep dive explanation of minecraft mechanics are amazing, wishing this blows up

[@dzuchun]

that graph of average xp/orb vs total xp dropped kinda looks like a fractal to me I wonder what it's dimentionaly is. could be a good value to include into "minecraft iceberg" sort of video :) love your stuff

[@nikolasscholz7983]

its not fractional, its discrete.

[@abyssaljam441]

​@@nikolasscholz7983wouldn't it still have a dimensionality though, just of a line? So 1?

[@nikolasscholz7983]

@@abyssaljam441 dimensionality is kinda weird on non continuous sets. what dimension does the set {1,2,3,4} have? now map each of the elements onto another set of 4 elements and you have a structure thats similar to what is shown (just with more elements per set).

[@dzuchun]

@@nikolasscholz7983 I guess, you can always double it, and get a really continious-looking graph in the end then, we should define what our object actually is. I propose it being a set of rectangles, kinda like histogram then, you can measure how it's area changes, when you double it's length. my guess it that it will be between 2 and 4-times increase, and thus this structure would have fractional dimentionality although, the more I think about it, the more I feel like it will still be just 2 :sad:

[@dzuchun]

@@nikolasscholz7983 yeah, about {1,2,3,4} set - I meant geometric dimentionality as I understand it, so we need to define some sort of geometric object to compute it

[@Toogzoog]

It never fails to surprise me how a game mechanic that appears so simple on the surface can have such strange and complicated systems behind it. Cool video.

[@StarlightVoid54]

@cubicmetre did a very good breakdown of xp orbs and mechanics in his God Particle series. If I recall the content of that video correctly, one of the explanations for the prime nature of xp orbs is that you can create any number using prime components, which fits nice with xp as the value which has to be turned into orbs is variable.

[@ari90i]

I loved the 3blue1brown esque editing. Super high quality stuff man :D

[@kavinesh_the_legend]

Consider renaming your channel to Quantum Minecraft

[@el_bob.]

2:41, it's because 73 is 21st prime number and if you write it backwards, you get 37 wich is the 12nd prime number.

[@zgredczwartyniesamowity363]

21st and 37 hmmm /Laughs in Polish/

[@seigel2289]

I'm sure they picked 73 because it's Sheldon's prime (there's a wiki page about it for the curious)

[@user-lk8uk1nc6o]

great vid! cubicmetre did a video about the exp farms once, that covered the first part of the video, but most of this video was completely new!

[@SuperLlama88888]

Great video! Loved the animations!

[@tassaron]

This video is truly excellent. Very nice visuals and clearly explained :)

[@deadlydirtblock7698]

Very interesting video, thanks for sharing. It's actually possible to sort xp orbs by size using the merging mechanic. Jonas paladin has a video showing the proof of concept. Essentially you use the fact that the border of the lazy chunks acts as a one-way barrier to xp merging (orbs can merge into lazy chunks but can't get out) in order to filter the orbs. It does require a constant stream of orbs of a known size, he uses creepers to filter the orbs of size 3 from a stream of guardian xp, leaving only the size 7 orbs.

[@paradoxonmodding2373]

Great Video it was really entertaining and is well made. Keep up the good work. One more thing to add about maximizing the value of orbs to pick up. XP Orbs are created highest first. So the highest value orb gets created first in the game code. This means that in theory you could use entity age seperation to split the orbs. In case of Ravagers they will always drop 2 orbs since they dont have equiptment. This means that if you were to seperate the different sized orbs the theoretical max rate Ravager XP farm is 612k xp/hr since that would be the maximum speed a player could pick up value 17 orbs.

[@user-wv1in4pz2w]

I wonder if the merging mechanic could somehow be used for filtering the orbs. Like, maybe with a little bit of setup before running the farm, it's possible to isolate groups of orbs and then have a stream of orbs out of which the desired (or maybe the undesired) ones get absorbed.

[@danielrhouck]

Is there a way to separate xp orbs by size? If you could make only the large orbs reach the player that would be useful.

[@123sendodo4]

Cool explanation! Never knew mob farming with saturated xp orbs would be a thing

[@alexandernazarov1642]

the fact that there is someone who is willing to make a video explanation on Minecraft XP-orb mechanics fully visualising all utilized algebra astonishes me

[@Yasser-444]

it would be nice if xp merging will add the values, if only there was a mod to do it 👀

[@WackoMcGoose]

Kinda reminds me of all the math Zedaph had to have someone figure out for his _I XP'd Myself_ zedvancement. Also interesting that a Tactical Tickle farm gives higher rates than enderman farms...

[@El_pouleto]

I swear to god you channel deserve million. If a was a KZbin staff member I would have pushed to algorithm to promote you. Seriously you're awfully underrated compared to your level

[@therealdualipa]

the whole 73 prime thing is probably so that 100 is more easily do-able

[@arkesh110]

Damn, i thought this was a SoME3 submission at first, but then i realized it was posted in october. The detail and explaination in this video is amazing

[@Tucher97]

This video is actually helpful especially in a modpack that makes XP essential for like using anything.

[@kylepetersen6520]

It's wild to me that a game that most of us started playing as children is now a common discussion for complex ideas, not just with just optimizing certain functions based on how the game is designed but also building complex machines that do some truly amazing things. What seems like such a simple game can have so much to offer, it can appeal to nearly everyone at some level for some reason.

[@entothechesnautknight1762]

I love weird math in video games, its usually a pretty solid analog for real life woth how the systems unintentionally built on top of eachother interact so weirdly.

[@JohnWittle]

For what it's worth, I went and asked GPT4 the same question and it found the pattern you mentioned of 'next prime +1' but said it couldn't be right because of 73. then it found some 7-term polynomial that supposedly intersected all the points, but i didn't check it and was skeptical

[@Daedalus-Inc]

Technically, there is a way to mathematically calculate how many orbs you get from a given xp value, but it includes a lot of floors and modulos, and isn't pretty.

[@intrepidmixedmedia7939]

This guy really ponders the orbs

[@primojuvenal6874]

Dude could cure cancer but he is playing minecraft.

[@tempest6027]

"so i asked ChatGPT, which just lied to me again and again. so i asked someone known for being good at math." something about that is so hilarious

[@drzombiecakes9563]

It is weird. In all but 1 case they either picked the closer number OR they picked the number that was higher if they were equally distanced. Except for 307! It is 8 higher than 299, whereas 293 (which wasn't picked) was only 6 lower

[@WhoThisMonkey]

I couldn't fall asleep last night, your video helped. Thank you!

[@lorenzoterrasi4491]

I don't get why they don't make sculk useful via xp orb size. I would happily take a percentage reduction of the exp from a farm if it meant having a 7 exp orb guaranteed every time I break a sculk block. That would speed up exp gain and make sculk's features actually useful instead of being a dead mechanic. Not to mess up game progression, naturally generated sculk could still give less exp just like natural shriekers and placed shriekers are different.

[@AgentM124]

Would there be a way to filter out/sort/separate out the higher level xp orbs using the merging mechanic and let the small orbs go into lava? Perhaps you could first prepare some high level orbs, and cycle them on a conveyor belt with ice and let them go around past the player at max absorbption rate while those orbs get replenished by a farm producing those high orbs. The high orbs will stack, but the low value orbs will fall through and get killed. Personally I don't have much skill setting such thing up, perhaps you could explore this concept?

[@dbaker280]

Dude this is amazing. Can you please do a behind the scenes how you do the animations in your vids?

[@yaboikungpowfuckfinger7697]

I always love it when video games make use of math in a way that produces beautiful results. Something about it is just so cool to me

[@livefromhollywood194]

Wait, does this mean that if you could sort the pillagers into weapon holders/non-holders, you could kill only the holders and produce more XP?

[@Psychomaniac14]

that's not possible but yes

[@JeremyCCox]

Nico is Lost mentioning White Stone Jazz... The niche Minecraft sphere is so niche it is self referencing. Great video as always. You always do such a good job of covering a topic!

[@madman2572]

Wowah. I never thoughy about endermen actyally.having an averagr of 2 after building up orbs. It makes so much sense when you think about it. I beleive gold farms have the exact same xp distribution as pillagers so the cactus is pretty aplicable for several existing farms. Looks like gardians are still the best answer eithet way though!

[@kingusXL]

mojang's gonna have a stroke once they find out about the Clumps mod

[@dj_lumen7298]

really thorough

[@itsv1p3r]

That endermite farm clip was one of the most cursed things i have ever seen

[@stewartbugler6157]

I think the deviation in the climbing of the primes is about roundness. So like if I remember correctly drawing circles with squares like pixel art strangely divide into prime bits. Making a quarter of the full circle image. Size 1 is 2^2 • • 3 • •• •• • 7 ••• •••• •••• ••• to save time I used the margin to act as the symmetry line.

[@Zero-4793]

Additionaly querks of xp are its iregegular scaling and the fact that it burns. why is xp destryable?

[@TheByQQ]

1:38 "ChatGPT kept lying to me, 7*2+1 isn't 17" 2:18 "7*2+1 is 15 so we pick 17" Crazy that it got the correct answer with the wrong method

[@GOAT_GOATERSON]

I think this is the reason that gnembon's guardian farm is the fastest

[@aaaaaaaaaaaa9023]

How fast would a ravager only farm be?

[@themountaindude]

That _sweet sensation_ when ya get the Large XP Orb... that sound, man

[@Teryte]

This is just a really good video

[@alintras]

I love this video but I never stand at my enderman farm for an whole hour

[@ColorBirb]

If anyone is curious, the song in the beginning of the video is Joe Stapp - Another New Years Day

[@benjamincarnell2590]

The fact that I was completely unaware of these game mechanics is a good indication that I am a moron, and have absolutely no idea how to make an XP farm that doesn't involve manually jamming stacks of meat into a furnace.

[@williamlangdon1132]

absolutely amazing

[@k4izo]

amazing video (the video was posted 20s ago)

[@Jockey-dz7eb]

lol

[@cedricmeister9258]

So how do i make them cluster without swarming around me not merging?

[@mindlessmrawesome]

That orb grouping mechanic is wierd... wonder why they chose that over just merging the orbs. Maybe a performance reason?

[@monsterplay3808]

4:55 That is (I think) the first fractal I have ever recognized as one without it being labeled as such.

[@Rashaexe]

2:23 I'm no mathematician but an observation I made with the strangeness of 73 as the given number instead of 79; What if the number was the closest prime number, but if the difference is equal, the higher number is chosen over the smaller counter part? 15: 13,17 (-2/+2, so pick the higher 17) 35: 31,37 (-4/+2, so the closer one is 37) 75: 73,79 (-2/+4, so the closer one is 73) 147: 139,149 (-8/+2, so the closer one is 149) Etc.

[@NicoisLOST]

Yes.. but go just one more ;-)

[@Rashaexe]

@@NicoisLOST Nevermind then! Yeah there probably isn't a pattern to this... lol

[@gut2814]

I need more minecraft videos like this

[@wabsol]

well but there is also an entity limit for overlapping on a coörd, spawning more mobs means they vannish quicker and so you have less time to kill them. just a tought

[@mr.boomguy]

This is basically 'work smarter, not harder'. So, from how I understand it, the better the obsorbtion, the more xp per minute. Don't let the wrong orbs build up, and build the right farm for it

[@65mustangfan4]

I don't even play minecraft anymore but this was a well made interesting vid good job man

[@baum851]

A really nice video it showed me that minecraft is even comlicated then I thought...😂

[@BurrritoYT]

The amount of XP you need to advance a level doesn't really increase exponentially; a better word would be quadratically

[@abyssaljam441]

What is that pillager farm? It looks abserd, does it make emiralds?

[@cornbonzo7027]

My main takeaway from this video is that niko doesn’t use fancy leaves???

[@eli_0625]

Now what is the max XP absorbtion farm really? Build one for us pls

[@IndraKurniawan]

Java Spigot multiplayer server software and its forks has XP clamp enabled by default.

[@K-J-A]

Regarding the usefulness of these systems, I believe there are certainly reasons...even though these reasons are not clear to us.... But I wonder how this would be explained in the game's lore. 🤔🤯💥

[@filipsoderberg3621]

Would mending change the xp absorption? For example does excess orbs go straight to the sword or take up the player absorption rate and then to the sword?

[@lukebeich]

Yeah, XP is weird... I wonder why Mojang wants to stick with this orb mechanic, if it is only a legacy thing or if there is an intended design reason. Aren't mass amounts XP orbs one of the reasons for lags too?

[@dr.blockcraft6633]

Part of The end Dragon fight. Kill the Dragon, the "hardest Fight", you Get a Big flashy Reward of XP, raining Down on You.

[@xseek]

As usual tricked me to leaning and watching math video :D

[@MrLoloshenyka]

prob 73 is the closest prime to given number. 15 is right between 13 and 17, so i guess it is just kind of rounding to 17, like 0.5 rounding to 1, when it is right in the middle

[@fortun8diamond]

I understand how it works though. The Minecraft wiki told me everything

[@mr.cheese2499]

We can make xp absorption perfect by downloading the clumps mod, which also reduces lag

[@Awesomekraken677]

Damn, this was a short one, only 9 seconds long

[@pissass3845]

Prime number orb sizes makes sense because to split exp into orbs of fixed sizes the math the computer has to do it extremely quick. Just compare then subtract which are two of the cheapest computations to do recursively. Look up greedy algorithms to get an idea of what I mean.

[@emmafountain2059]

There’s much much faster ways to do something like this than with primes. For example just use orbs which are powers of 2 and the binary representation of the number (which the computer is already storing anyways) tells you exactly what orbs to spawn. It would be constant time with the only operation being a single read. Eg; if you need 11 xp in binary thats 1101 so you have a 1xp orb, a 2xp orb, no 4xp orb, and an 8xp orb.

[@Gandhi_Physique]

Wow. I always thought the simple option. More mob equals much bigger xp. Interesting stuff.

[@FarmandSMC]

This video was a great experience.

[@NicoisLOST]

👏

[@Psychomaniac14]

fortunately there's at least one mod out there that clumps XP together as you'd think it would

[@NathanHaaren]

xp in minecraft needs a reform everything should just drop 1 orb, like endermen dropping an orb of 5xp orbs of the same size should be able to merge, like a stack of items, like 3 endermen should be 3 merged orbs of 5xp (15xp total) the maximum orbs picked up by a player should stay the same, it could start picking up orbs from these stacks by either xp size, orb stack size or start with the oldest orb first this would greatly reduce the amount of orbs that will exist and will improve performance in huge farms