Squaring Primes - Numberphile

Matt Parker is squaring primes.
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[clearlycnfusd]

Watching a PhD mathematician struggle to get 17^2 was reassuring.

[jerry]

*Sees first two primes don’t follow his rule

*Calls them sub primes.

[Jacob-yglz]

I like how hard it was for him to do the math in his head. It reminds me of the saying "the more math you know, the harder it is to do math"

[munjee]

It amazing how matt did all the mental maths perfectly and then said 170 +70 AND 49 is somehow less than the original

[N.I.R.A.T.I.A.S.]

Video starts with Matt trying to Parker square 17.

[Richard_is_cool]

0:58 I love how he rewrote the 139 to make it read 289 after he scored out that calculation so he could say "Dammit I was right". Parker convincing.

[KingdaToro]

4:31 Matt received weapons of math instruction

[BrooksMoses]

I like how the four categories from your proof also show up in the "easier" proof. Either the multiple of 4 is above or below the prime, and either the multiple of 3 is above or below the prime, giving four possibilities that directly correspond to your categories.

[j_sum]

17^2=139
I think I just witnessed Parker Squaring.

[seanfraser]

“I like to argue that 2 and 3 are not real primes”

Goodbye, fundamental theorem of arithmetic

[sietsejohannes]

Matt: There is a pattern with prime squares, they are all multiples of 24 plus 1.
All?
Matt: Almost all.
So it's a parker squares pattern then...

[HunterJE]

That second proof gave me chills down my spine when I saw where it was going, you might even say it was an Amazingly Satisfying Mathematical Result

[dan_trpdr]

Only three things are certain: Death, Taxes, and Parker Square jokes.

[yuvalne]

17^2=139.
C'mon. Now you're just begging us to make a Parker Square joke.

[BBand]

Nice sneaky edit of the 139 on the paper

[yoni]

I am currently doing my degree in maths and one of the things we need to prove is that all primes squared (above 3) are one more than a multiple of 6, and I know how to prove it because of your video. love you matt!!!!

[nimmin]

3*3 is one more than 8, 1/3 of 24.
2*2 is one more than 3, 1/8 of 24.
Pretty neat!

[christianp]

17²=139, nice to start the video with a parker equation!

[ractheworld]

I just love your guests, every one of them. Listening to them is such a treat.
Thanks

[MrYairosh]

my theorem: every prime cubed is one more than a multiple of 2.