309

This number is a composite.

Just showing those entries submitted by 'Firoozbakht': (Click here to show all)

+ prime(309)^309 + 2 is prime. With the exception of 309, all known such numbers (up to 10000) are the first three primes. [Firoozbakht]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell