I mean 4 is equivalent to 4 mod 21. That part's not AI slop.

I think, in fact, for every prime number p at least 5, 4 mod p is (congruent to) 4.

Even without the restriction to primes, that feels like a pretty good guess!

Or for less than 5.

	▲	oh_my_goodness 6 days ago \| parent [-]
		lol good point.