7309

This number is a prime.

+ Pluto was closer to the Sun than Neptune for 7309 days (from 2/7/1979 to 2/11/1999). Did you notice that 2, 7, 11, 1979, 1999, and 7309 are all primes? [Gaydos]

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