This number is a prime.
Single Curio View: (Seek other curios for this number)It is not known whether the double-Mersenne number MM(61) is prime or composite. It contains 694127911065419642 digits and is currently far too large for the usual Lucas-Lehmer test.
Submitted: 2006-08-26 21:12:11; Last Modified: 2020-07-21 19:26:38.
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