138731
This number is a prime.
Sigma(65537+257+17+5+3)+65537+257+17+5+3 is prime. Note that these are the only known Fermat primes. [Sariyar]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
Sigma(65537+257+17+5+3)+65537+257+17+5+3 is prime. Note that these are the only known Fermat primes. [Sariyar]