10000...00001 (49-digits)

This number is a prime.

100000000 0000000000 0000060000 0000000000 0000000001

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The only square-congruent prime p of order 7 of the form p = a000...0b0...000a. [Loungrides]

Submitted: 2015-12-18 17:09:52; Last Modified: 2018-04-14 12:26:47.