257
This number is a prime.
Single Curio View: (Seek other curios for this number)
The only known Fermat prime that is not a member of
a twin prime pair. [Honaker]
Submitted: 2015-01-09 02:25:49; Last Modified: 2015-01-10 00:10:53.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell