37
This number is a prime.
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The 37th Mersenne prime exponent, 3021377, starts with 3 and ends with 7 and also contains 37. This is the only known Mersenne exponent with this property. [Laurv]
Submitted: 2004-01-13 06:39:01; Last Modified: 2008-12-05 03:22:24.
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