14

This number is a composite.

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The smallest number such that (n + 3, n + 5, n + 17, n + 257, n + 65537) are all primes. Note that 3, 5, 17, 257 and 65537 are the known Fermat primes. [Russo]

Submitted: 2001-08-20 07:44:49; Last Modified: 2008-01-30 17:28:00.