7309

This number is a prime.

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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]

Submitted: 2015-10-30 16:20:31; Last Modified: 2022-02-21 15:10:28.