683
This number is a prime.
Single Curio View: (Seek other curios for this number)
Smallest Wagstaff prime p such that (2^p+1)/3 is not prime.
Submitted: 2016-02-15 12:51:09; Last Modified: 2021-03-21 00:44:05.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell