257

This number is a prime.

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The only known Fermat prime that is not a member of a twin prime pair. [Honaker]

Submitted: 2015-01-08 20:25:49;   Last Modified: 2015-01-09 18:10:53.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell