7

This number is a prime.

Single Curio View: (Seek other curios for this number)

Patterson's Conjecture: If P_n is the nth prime, then the series (P₁-1 + P₂-2 + P₃-3 + ... + P_n-n) is divisible by Pn if and only if P_n = 7.

Submitted: 2008-10-11 15:56:43; Last Modified: 2008-10-12 20:57:52.