383 is cool - Numberphile

[@numberphile]

Don't miss out on a Centenary of Woodall Primes T-Shirt, Hoodie, and Mug... It's a once in a century opportunity... US customers - teespring.com/woodall-primes-US EU customers - teespring.com/woodall-primes-eu Mug - teespring.com/woodall-prime-mug-us

[@Peter_1986]

Matt is cute when he talks passionately about maths.

[@luigig44]

I'm in Argentina, can I order a shirt? If so, should I buy the US or EU one?

[@mYOwngUn]

how do you guys find out all those properties ? I mean do you think like : "oh that particular number probably will add up of the first two palyndromic prime numbers" ??? I really would appreciate to get to know that.

[@Aviationlover-belugaxl]

Numbers

[@Aviationlover-belugaxl]

Макс Вишняков Игоревич! 🕵🏿🖕😄

[@deannasmith4443]

"we can't forget 383..." "i forgot 383..." classic.

[@Snaveltje12]

Just another parker square

[@zacchon]

#383neverforget

[@osmium6832]

He forgot the 3rd digit of a 3 digit palindromic number but rattled off two 7-digit numbers off the top of his head a minute later at 4:50. I'll never understand how they do that.

[@nelsonemerson6690]

Cue cards.

[@agar0285]

Pi likes right now

[@jkazos]

A mathematician just said "losing touch with our roots". I have no words.

[@KJ_XCV]

Pls elaborate I don't get why that is special

[@Fummy007]

Took me a second to get the joke when he said it.

[@DigGil3]

Roots of numbers, like the square root.

[@lineardielectric]

Polynomial equations have roots. Square and indeed nth roots are als a thing

[@8bit_pineapple]

+Fishurmomball You see, "losing touch with your roots" is usually a turn of phrase in the English language to mean losing touch with your origins or original concept or whatever. However, in mathematics "roots" could be interpreted to mean "roots" as in square roots or the roots of an equation or something to that effect. So a mathematician could use something known as "Wordplay" - noun, definition: The witty exploitation of the meaning and ambiguities of words, to use the phrase "losing touch with your roots" for comedic effect. For example, suppose a mathematician is asked "What is the square root of 9.", he may respond "4! ... wait no 3. Sorry I am losing touch with my roots". This is humerous because it is an example of "Wordplay", the "ambiguities of words" in this case is the ambiguity of the word "roots", as ordinarily it is used to mean "origins" whereas the mathematician is using it for a more obscure meaning.

[@Critic1273]

Oh my gosh, Brady, the Parker Square Vietnam-style flashback. Killed me.

[@awildturtle8273]

Ikr

[@saopy]

383rd like (jk)

[@maazali9604]

@@SpencerKraisler go watch numberphile parker square video and you'll understand it's about magic squares

[@Triantalex]

??

[@reububble]

What we need is a Parker prime.

[@davidbatetc]

reububble 3×2^4-1 is a Parker prime

[@claeshenriksson5702]

That would be a number that only is divisible by two other prime numbers, right?

[@ckmishn3664]

It would just be 2^n - 1 for an n larger than the biggest checked Mersenne prime. In fact it would be for the smallest n that there's no chance we could ever check if it's actually prime in his lifetime.

[@helloitsme7553]

A parker prime would be (3•2²)||1 as in concatenation

[@cineblazer]

Picks some thousand digit number, spends three years proving successfully that it's a prime, notices a decade later that he forgot to carry a one.

[@jesusthroughmary]

Found a new world record Woodall Prime in March 2018. N = 17,016,602. 5,122.515 digits. 16th largest known prime overall, 5th largest non-Mersenne prime.

[@zixuan1630]

omg

[@florencefortyseven]

I love that it was found a palindromic prime number of years since the original paper. Very fitting.

[@chriswebster24]

How do you know it’s prime, though? Anyone can make up a huge number and say it’s prime. I bet that number is divisible by 7 or something 😂

[@locomotivetrainstation6053]

@@chriswebster24 it's possible to test primility for very high numbers, so no. It is not divisible by 7

[@SG2048-meta]

@@chriswebster24 people can figure out that it is prime with many methods, please don’t just deny it.

[@Mp57navy]

−273.15 is cooler. In fact, it's the coolest.

[@vircaprae3060]

xD

[@1bgrant]

Mp57navy I would wager zero kelvin is cooler.

[@lukeboggon4769]

-273.15c is 0 kelvin.

[@fergusmaclachlan1404]

Mp57navy Only in degrees Celsius. Don't drop units please.

[@TrickShotKoopa]

what a knee slapper for people who get the joke.

[@hairlessape5107]

2:42 - "...I know it's a palindrome, and I've written more than half of it. So I've got no excuses." I'm sure the neighbours heard me laugh.

[@upandatom]

I just stumbled across this channel and am in love o_O

[@delve_]

Oh, hi, Jade! Funny seeing your old comment here. Say hello to 2017 for me!

[@hamiltonianpathondodecahed5236]

hello there

[@abhishekbagchi6052]

Have to say same thing about your channel 🙂

[@mienzillaz]

Are those two things related to each other? Or you just wanted to share that you're in love? If so how's it going?

[@nathanielsharabi]

that parker square flashback 😂😂

[@katzen3314]

Didn't even realise it haha.

[@Silentpanda]

They should start being sponsored by Parker Square(space).

[@CH3LS3A]

it was also at 2:41

[@CH3LS3A]

241+142

[@salmjak]

I catched this comment on 383 likes then someone ruined it...

[@MatthewBaka]

"It's a bit base 10-y" My thoughts exactly.

[@cecillemilitante3115]

When he said this,I got to this comment at the same time.

[@DogberttheCeo]

That Parker Square edit though :D:D:D I literally laughed out loudly! Thanks for that moment

[@tennisdude52278]

I demand another calculator unboxing.

[@jonathanc8845]

Wikipedia tells me they found a new Woodall prime as of March 2018

[@aries_9130]

I love how Brady keeps sneaking in the Parker square. So savage.

[@1234macro]

Next videos: 384 is cool 385 is cool 386 is cool 387 is cool 388 is cool 389 is not cool (for obvious reasons)

[@1234macro]

s s Well, it's self-explanatory, really.

[@deannasmith4443]

because 3 ate 9.

[@AntimonyInSushi]

Left as an exercise for the reader :D

[@marcelweber7813]

To be honest: 386 isn't that coolish too. But when you look at 391: amazing!

[@pbpbpbpbpbpbpbpbpb]

But there can't be any uncool numbers, if there were, there would be a smallest, which would make that cool! So, there can't be any!

[@Gperramon]

Matt is making Numberphile great again!

[@lxjuani]

Guillem When did it stop being great?! I was probably sleeping.

[@Gperramon]

Juan Garay I was referring to what Matt said at 0:20 , just a joke

[@morboed96]

So the 383rd anniversary is in 2300? That's so cool. :-D

[@davidsmith-nb6np]

2400?

[@oz_jones]

@@davidsmith-nb6np 2300

[@EHMM]

@@davidsmith-nb6np 2.3K or 0.0023M

[@cubong9826]

i discovered what 'mersenne primes' were on my own through studying perfect numbers and did not realise that they were actually recognised by mathematicians until now.

[@8MasterX]

"Any semi-arbitrary number, if you dig into it, it's gonna have some cool properties!" - Thanks, Matt. This inspired me. :]

[@zioscozio]

About time, we've definitely been losing touch with our roots of 146,689!

[@jasscat7645]

HA

[@unknownfury7672]

Ffs 😂

[@smilingipad3044]

This rule of adding up the first three palindromic primes to get another palindromic prime can be extended to any counting system: The first 3 palindromic three digit primes in hexadecimal are 101, 151, and 161 (257, 337, 353 in decimal). Add these up, and you get 3B3, another palindrome. 3B3 in decimal is a prime number, 947.

[@jqerty]

"I've been doing a lot to day" Let's hope there are some calculators unboxed then :)

[@karlheinzkobras]

May I add something? The page 383 of James Joyce's "Finnegans Wake" starts with the line "Three quarks for muster Mark". This delivered the name "quarks' for these elementary particles.

[@purplesnos]

I am simple man. I see video at 10:30 at night. See it is Numberphile. I watch it.

[@wierdalien1]

Randolf Rafaol boring like you then

[@dextrodemon]

not that simple seeing as you added an extra clause to the meme.

[@TouchingClothProd]

This video just convinced me to convert to numerology. All hail the Primes!

[@AndyWilliams8]

When you're the best man, and you have to come up with a speech about the perfectly average, quite boring groom.

[@douro20]

The next Woodall prime was found on March 21, 2018. Its value is 17016602*2^17016602-1. It was also found by PrimeGrid.

[@mothman.industries]

"383 is cool" fits in pretty well with all of the car guy stuff on my sub feed. I'm here, and ready to be disappointed that it's not about engines.

[@Far_Gem]

I love the fact that you put the Parker Square in there :D

[@arcstur]

I was missing these kind of videos :D

[@almoglevin]

I love that you champion the overlooked numbers. Shy numbers. Introvert numbers. Someone should pay attention to those numbers too! They do all their work quietly, being added, divided and raised to powers while pi and e get all the glory.

[@onefaraday5146]

383 is my second-favorite number. Not even kidding. O.O You just made my day.

[@aslemos2009]

Crucially, 383 is the 25th 3-digit decimal number with 2 repeated digits that converted to octal (577) gives a number that also has two repeated digits. It is the 8th prime number to have that property. Remarkably, 25 is a a square, and 8 is a cube.

[@SendyTheEndless]

Ahh, so close! My favourite number is 383.000001, can you do that one next time?

[@EulyDerg]

Mine is 383+ε

[@EulyDerg]

ε is infinitesimally close to 0 but not equal to it; it is a hyperreal number.

[@notdisclosed]

Most importantly, 383 is a safe prime. You should do a show on safe primes. They can make some really long period pseudorandom number generators when used as a modulus for the product of two numbers in a revolving list of numbers.

[@alexcannon-microdot]

383 also has reflective symmetry, which is cool.

[@Atilolzz]

Matt Parker says he build a PC only to find Prime Numbers at 5:39 But when you pause at 5:50, you can not only see that he has a 300 Dollar/Pound Intel I7 4770K processor, but also a Nvidia GTX 760 gaming Graphics Card and 16GB of RAM Seems like Matt doesnt only solve prime numbers in his free time :P

[@stellarfirefly]

We need a website that, upon input of any integer, will spew out a huge list of the "interesting" things about that integer.

[@oz_jones]

It might have been a fever dream but I swear I have seen this kind of a website before.

[@Robi2009]

Osmorosvo it's called Wolfram Alpha :)

[@daleftuprightatsoldierfield]

Inserts 14972...

[@europeanki8616]

this is quite motivational actually, this video shows that everyone, even if maybe not that obvious at first, is special and valuable when you get to know more about them

[@benl9993]

I wonder what the largest known prime that is prime number of digits long is?

[@vpumeyyv]

Captain here. After some searches, I found that 27653*2^9167433+1 is the largest known prime that is prime number of digits long. It has 2759677 digits, and it is the 24th biggest known prime number. *Flies away*

[@pietervannes4476]

2759677 is 7 digits long, which is prime as well :D

[@syphonuk]

My home town's dialling code was (0)383 when I was a little kid. It's (01)383 now of course. Dunfermline in Scotland if you're interested.

[@cally9336]

I was wondering if you could help me understand a pattern I found when I was bored one day in math class. On a calculator, the 1 through 9 buttons are arranged in a 3×3 square. When you take the 4 numbers made on the sides of this square, or any of the possible 2×2 squares made on this grid, and make the equation a-b+c-d it always equals 0. For example, going around the perimeter of the largest square clockwise starting at 7 makes the equation 789-963+321-147=0. But this works with every square made by the 1 through 9 grid, clockwise or counterclockwise. Why is this? Why does this pattern exist? This has been bothering me for eight years. Please explain it! It's driving me insane.

[@Gumby902]

Wow. I never noticed this before, so when I was checking it out I thought, what about the lines crossing the center? and they do as well . Very cool thanks for pointing it out. Now this will drive me insane as well... 753-852+951-654+357-258+159-456=0

[@cally9336]

Gumby902 I never noticed that, nice catch. It rather strange, isn't it?

[@bobbysanchez6308]

+Cally For the example that you provided, it's actually a very simple explanation: going around the outskirts of the grid you find that there are 8 numbers. Because it is even, half of the values will be + and the other half -. This cancels out the fives in the middle of each three digit term. Since you are going around the grid, each number opposite of it when added together will equal ten. Since it's even once again the values cancel out. What I find interesting in particular is that (ignoring 5 for this) the corner values make up 1,3,9,7 (1,3,9,27) and the rest make up 2,4,8,6 (2,4,8,16).

[@skyler8460]

I think matt may have made a video about this recently on his standupmaths channel

[@FinetalPies]

I was actually thinking last month that Numberphile has strayed from its roots of just dedicating episodes to just...numbers. I appreciate this video

[@upandatom]

How the heck does he remember all those huge numbers?

[@bobbycraig2583]

Omg it's you! I don't know

[@enceladus32]

When he asked for help on finding Woodall primes, I just about picked up my notebook to start working, and then he mentioned the world record. Never mind.

[@TheVeryHungrySingularity]

383 is pretty much the best number

[@standupmaths]

William You know it!

[@feynstein1004]

I think that honor should go to 73.

[@mythology2467]

well, now thanks to me Matt's comment has 73 likes, happy?

[@unfetteredparacosmian]

@@feynstein1004 *53

[@feynstein1004]

@Majestas Alt Why's that?

[@meleader]

Is "base tenny" anything like a "bass tenor"?

[@Europa_Forever]

anyone else notice that little blip at 2:40? Anyone got ideas on what that is? perhaps a secret message! :D

[@raycortez3242]

Joshua Fuller parker square

[@calcul8er205]

Joshua Fuller Parker square !

[@TaylerJDust]

You can just use space and pause the video and see its a square of numbers, I think its from an earlier video, or maybe a teaser for a future video.

[@fergusmaclachlan1404]

Yep, it's the Parker square.

[@TheQueue841]

On desktop, you can pause around there and use the , or . keys to move back and forth one frame.

[@snoopyjc]

UPDATE: As of October 2018, the largest known Woodall prime is 17016602 × 217016602 − 1. It has 5,122,515 digits and was found by Diego Bertolotti in March 2018 in the distributed computing project PrimeGrid. ~Wikipedia

[@Gamespy666]

There aren't any uninteresting numbers. If there were any, then it would exist the smallest uninteresting number, and that makes it interesting. So there is no smallest uninteresting number and therefore no uninteresting number. q.e.d.

[@zanti4132]

That's a variation on another story: A man condemned to death was told he must be executed on a predetermined day the following week, and he must not know what day it is. So the man argued, "Well, then I can't be executed on Saturday, since if you wait until Saturday I would know my execution would be that day. Since you can't execute me on Saturday, if you wait until Friday I would know my execution would have to be that day, therefore you also can't execute me on Friday. The same goes for Thursday, then Wednesday, yadda yadda, hence there is no way I can be executed without my knowing the day of my execution." So the man went back to his jail cell, confident he had talked his way out of a death sentence, and he was caught completely by surprise when the executioner showed up on Tuesday the following week to carry out the sentence. My point is, clearly there are uninteresting numbers, even if we limit ourselves to the positive integers. The set of uninteresting positive integers is a countable infinity. To say the smallest uninteresting positive integer is therefore interesting is actually an arbitrary decision, and it dies just like that fast-talking man in the story.

[@Spyder2384]

Awesome shout out to PrimeGrid. Been using it for years, it's an awesome community always looking for new prime searchers!

[@Niko0902]

1917? WORKERS OF THE WORLD UNITE!!

[@deannasmith4443]

introverts unite... separately in your own homes. =p

[@oz_jones]

That didn't end well, there was a big party but not enough food.

[@Ynook]

2:41, magic square! :D

[@nothosaur]

They keep saying that it's cool, but I've repeatedly confirmed that temperature is totally irrelevant to the issue.

[@TrickShotKoopa]

Nice one.

[@_mrundercoverhd_]

I didn't know 383 was cool like that?!

[@Jose-pq4ow]

Each time Matt appears I wear a new t-shirt, Could that be consider a new rule?

[@ruinenlust_]

It's a law of nature. You're the chosen one.

[@WombatSlug]

Matt always makes a great argument. It's easy to be taken in by his enthusiasm.

[@wulldg6386]

A mile of E at 2.718 million subs

[@fergusmaclachlan1404]

Hey, don't you mean e? E is already used in physics for Energy.

[@laurenkatz8894]

Fergus Maclachlan don’t be mean for a typo

[@DBYNOE]

383 was the displacement of one of Chrysler's V8 engines back in the 70's ☺

[@Mat383]

Darnley Bynoe 383 is also the end of my name

[@tqnohe]

The sum of the first three palindromic primes. That's so like baseball statistics: So and so is the first switch hitting first baseman who was a former catcher to hit 30 homers and steal 30 bases in two consecutive seasons. Yes baseball keeps track of such ridiculous minute things and I'll just bet someone knows who so and so is.

[@numberphile]

+Timothy 53 that's why we love baseball. And I'm awaiting a commenter to supply the name of said former catcher!

[@justgonnastay]

383 with dual quads! Now THAT'S cool! Chrysler used to manufacture a 383 cubic inch performance engine. Topped with a tunnel ram intake manifold and two four-barrel carburetors (dual quads), it was quite a strong engine. Sorry, I grew up just outside Detroit, and cars run in my blood.

[@juhaniu6371]

You missed the opportunity to say 1917 is Finland's independence year. It's our 100th birthday!

[@TheMilwaukeeProtocol]

2:35 -- if you ask me, that's a sign of genius. Brain working really hard, juggling a ton of abstract things. Space cadet.

[@steveyankou4144]

311 + 69 = 420 (on a clock)

[@blue9139]

380 not 420...

[@LakeNipissing]

*383* was a great engine from Chrysler in the late 1960s during the muscle car era. (383 cubic inch V8)

[@rickyyoung2827]

not first

[@julesmcbride2692]

2:40 cackling rn

[@yojimmybob]

Numbers are boring. You can argue that certain numbers are interesting when you do certain things with them, but that underplays genuinely interesting topics in mathematics because you can make nearly any number "interesting" in this way. What's truly interesting are the mathematical concepts that make certain numbers "interesting", and you should draw attention to them in both the video and the title. Chemists don't say NaCl is cool because it's made from Na and Cl, so why would a mathematician claim a specific prime is cool because it's made from the sum of two other primes? It's so trivial, it's boring.

[@mikeletoris2487]

It's the way they interact and influence eachother that makes it interesting. Neat little coincidence makes it interesting.

[@LaytonBehelit]

The channel is called Numberphile

[@yojimmybob]

+Nike I think what makes that interesting is the underlying concept/theory/pattern of numbers rather than the numbers themselves. Certain constants can also be somewhat interesting; not so much the number itself, but the fact that it is a unique number that is important to a certain theory. If I'm deriving a physical formula to calculate a result, what's interesting is the connection between constants and formulas and physical phenomena. I'm not interested in the fact that my answer is 10 Joules, because the units are arbitrary, and number system is arbitrary, and this is only an answer to a very specific question rather than a general result. If I'm standing in a field and I learn that there are a number of four leaf clovers in the field with me, I'm interested by the fact that four leaf clovers exist, and not in identifying each and every one of them. If a particular number is interesting because it's a prime, it's not the number that's interesting, it's the fact that primes exist.

[@4myzelf]

Different people find different things interesting for different reasons. I find golf and MMA interesting but not for the same reasons and someone might also find them interesting as well for different reasons and someone else might find one boring and the other interesting for the exact reasons as me and someone else might find both boring for the very reasons I find them interesting. I get that you might not find it numbers interesting but that doesn't really mean everyone doesn't. So although the reasons you gave are valid reasons for you to not enjoy these types of videos, its definitely not for everyone.

[@yojimmybob]

+4myzelf I can appreciate that. Still, I feel that there are probably many people like myself who hated maths growing up because we were bombarded with numeracy and numerical puzzles before we got to the interesting parts. To say that mathematics has such a poor reputation, I think that channels like Numberphile who seek to popularise maths should probably try to engage people who aren't particularly enthused by numbers. Something as simple as explaining why I should care about 383 in the title could be enough.

[@abhilashsengupta9363]

They found the next Woodall prime in 2018 :(

[@Zahlenteufel1]

383 is the bus line I always used as a kid!

[@degueloface]

this just popped up and i checked, a new Woodall prime was discovered in 2018 through PrimeGrid!

[@agradman]

"And I know it's a palindrome, and I've written over half of it, so I've got no excuses." Second time I've seen this video in a year, still one of my favorite lines on the internet.

[@stinkytoby]

Parker square is the first video in the Parker playlist. Perfect

[@boeiend100]

I don't understand anything of any video they post. But I keep coming back to watch it.

[@MaxStax1]

383,the cubic inch displacement of an engine manufactured for Dodge/Chrysler/Plymouth cars starting in the early 60's. Most of the cars it went into were prime.😊

[@andrewbraun4679]

As a GM man I whole heartedly disagree with you. Regardless of the Dodge engine, the truly great engine with that displacement was the GM 350 block with the 400 crank! Always loved that engine from when I was a kid. I never knew that dodge had a factory engine with that displacement. I have never paid much attention to dodge and associated product brands at car shows and such. I think I will start looking for that engine!

[@ХекфеВол]

383 is a palindromic prime differing by 10 from the palindromic prime 373. It forms a cousin prime pair with previous prime 379 and a sexy prime pair with the next prime 389. It's a safe prime and its corresponding Sophie Germain prime is also palindromic - 191. But this prime isn't Sophie Germain since 2*383+1=767 isn't a prime (13*59).

[@fiftyfat]

I love how everytime the "ri" of prime become a "n" with a dot over it

[@tannereustace]

Depending on how you write your numbers, 383 has symmetry if you cut the numbers horizontally

[@OwenPrescott]

Today I tried walking up some Parker stairs, I kept tripping over the last step and falling back down.

[@janpokorny9710]

2:41 that parker squere :D

[@n.l.4025]

Matt Parker’s Parker Square is apparently in the form of Matt saying “Anything involving Palindromes is a little bit base-‘tenny’.”in this video at 1:57. There are many numbers in other bases that are also Palindromes, especially base-2, such as 101, which is also Matt’s first 3 digit Palindrome featured in this video although he was using in base-10, it can also be used in base 2, which means the number 3 in base 10. I always love finding Matt Parker’s Parker Square which is featured in each of his videos! It’s better than Finding Waldo!

[@novashock496]

Anyone else click on the shirt link at 10:00pm on April 3rd, only to realize that there was 40 minutes left, rushed downstairs and begged your parents to order one?

[@shy_dodecahedron]

1:18 wouldn't first palendromic prime be 2?

[@AldoOjeda]

Damn, you know what this means: now I'm going to add Prime Grid on my computers and any computer I can get my hands on.

[@erwinjohannarndt4166]

38 and 83 are my family numbers.... we had lot of ocurrences these two on our lifes and marked us deep... Im happy 383 finally made it to numberphile!..

[@AalbertTorsius]

Is there a playlist of all _Numberphile_ videos in numerical order?

[@davedee6745]

You know math is off the charts bonkers when "e" is a number.

[@quantum6861]

*You know you love maths when you're watching a video entitled "383 is cool"*

[@gauravbharwan6377]

At 2:41 the parker flash

[@Dark35tN1ght]

This might be one of the funniest Numberphile videos ever.

[@brunocosta6849]

I just realized that Matt Parker at 0.5 velocity looks and speaks like a drunk. This is wonderful

[@ro_yo_mi]

A Parker Slip = a momentary lapse of memory when dealing with arbitrary numbers.

[@qwikscopez6619]

Thanks for keeping my love for maths alive despite my teachers best efforrts

[@Kaihku]

Not to mention that 383 is also the name of a very famous italian pop band of the '90-s! And the band have this name from a famous Harley Davidson model.

[@johnburnham6239]

0:45 The way Mr. Parker writes an "i" to the right of an "r" is very interesting...

[@eoghan.5003]

Oh that's what I do

[@hakkbak]

Was looking forward to the next Numberphile video!!

[@samharper5881]

A new Woodall prime has been discovered. n=17,016,602.

[@denniscomerford]

OK. Out of all your videos, this is the one that got me to download BOINC and join the PrimeGrid project. I did not know of Woodall Primes. But I like underdogs. So, I am running BOINC in hopes of finding a Woodall Prime someday. Cheers!

[@donaldasayers]

Numberphile should be like periodic videos; a video on each number. You can start with the integers and when you have done them you can start on the fractions.