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
647004821Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
19599344162222672368312270.72018-07-17 00:18:31
History
DateUserTypeResult
2025-03-16James HeinrichF
Factor: 1959934416222267236831 / TF: 70-71
2018-07-17Alex_soldierF
Factor: 1959934416222267236831 / TF: 70-71*
2016-09-06NipalNF
no factor from 2^67 to 2^70
2014-06-15sasakiNF
no factor from 2^66 to 2^67
2014-03-19america64NF
no factor from 2^65 to 2^66
2010-11-05Architects CubedNF
no factor from 2^64 to 2^65
2010-07-31Architects CubedNF
no factor from 2^63 to 2^64