Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
681561557Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
4245071945456285733292168.52018-06-03 06:46:50
History
DateUserTypeResult
2018-06-03ConductorF
Factor: 424507194545628573329 / TF: 68-69
2016-10-18sasakiNF
no factor from 2^67 to 2^68
2014-08-01sasakiNF
no factor from 2^66 to 2^67
2014-01-22sasakiNF
no factor from 2^65 to 2^66