77777...77777 (25-digits)

This number is a prime.

                                                 77777 7777777277 7777777777

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The only near-repdigit square-congruent prime of order 5. [Loungrides]

Submitted: 2009-03-28 15:23:51;   Last Modified: 2009-03-28 17:44:52.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell