15555...55551 (33-digits)

This number is a prime.

                                        155 5555555555 5555555555 5555555551

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The digital sum of this prime is 157, another prime (whose digit sum in turn is yet another prime: 13). [Trotter]

Submitted: 2001-07-24 02:38:19;   Last Modified: 2008-01-30 17:28:00.
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