On: An Interesting Pattern in the Prime Numbers: Paral...

[gowld]

How is that?

Isn't it plotting a prime spiral, not GCD?

Obviously prime implies gcd=1, but the "kth" square isn't "k", because it's a spiral counting up from the center.

[mathythrowaway → gowld]

No, it isn't plotting a prime spiral. Each square in their triangle is a block of 75 numbers. Within the nth row the numbers are sorted by residue mod n.