68956417

This number is a prime.

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The larger known prime of the form P(m^2 + 1) = n^2 + 1 for m = 2015 and n = 8304. There are two smaller known and no others up to n = 2000000. See Puzzle 505. [Rivera]

Submitted: 2009-09-19 23:52:37; Last Modified: 2009-09-20 00:18:45.