55555...55559 (32-digits)

This number is a prime.

55 5555555555 5555555555 5555555559

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The largest prime less than a googol of form (5)_w9, (case w=31). [Loungrides]

Submitted: 2019-10-20 11:18:58; Last Modified: 2020-07-11 13:29:50.