# 1510553619999637

This number is a prime.

151055 3619999637

To get the number of primes between consecutive Mersenne primes 2^{31}-1 and 2^{61}-1, multiply 1510553619999637 by the prime formed from its last two digits. [Merickel]

(There is one curio for this number that has not yet been approved by an editor.)

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