User:A slice of 8.5397342

A Slice Of 8.5397342 is a reference to pi and e (pi×e is the same as pie) and pi×e is about 8.5397342 so the name is supposed to be a play on words (A Slice Of Pie).

I believe I may have discovered a probable prime test, if mod(n²,20)=1,9 then n is either 3x, prime, or a probable prime. I have been working on prime number criteria and I found this neat property. It only works for numbers over 3.