77232917

This number is a prime.

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The Mersenne prime exponent '77232917' contains a record-breaking eleven prime substrings when read left-to-right, i.e., 2, 3, 7, 17, 23, 29, 2917, 7723, 23291, 32917, 7232917. [Harrison]

Submitted: 2019-01-27 22:37:06; Last Modified: 2019-01-27 22:38:02.