127

This number is a prime.

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M(127) = M(M(7)) = M(M(M(3))) = M(M(M(M(2)))). Note that M(2), M(3), M(7) and M(127) are all Mersenne primes. [Capelle]

Submitted: 2007-06-13 05:34:34;   Last Modified: 2008-01-30 11:28:00.
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