Ha, super, thanks for making it.

Check out 431 columns - this yields no obvious persistent patterns.

cgijoe 5 days ago | parent | next [-]

You sure about that? I see some clear diagonal lines at 431 cols: https://imgur.com/a/rNKjTtr

ljsprague 5 days ago | parent | prev [-]

I think you'll find this to be the case with any prime.

eps 4 days ago | parent [-]

Not really. There are almost always clearly visible diagonals. Try 199, 211, 223, etc.

	▲	ljsprague 2 days ago \| parent [-]
		You're right. I guess then it comes down to how far away from a composite it is.