31313...32323 (108-digits)

This number is a prime.

                                   31313131 3131313131 3131313131 3131313131
3131313123 2323232323 2323232323 2323232323 2323232323 2323232323 2323232323

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Twenty-three 31's followed by thirty-one 23's is prime. [De Geest]

Submitted: 2004-02-06 22:23:51;   Last Modified: 2008-01-30 11:28:00.
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