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
647299921Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1851058593749757956172167.32016-09-16 04:05:21
History
DateUserTypeResult
2016-09-16NipalF
Factor: 185105859374975795617 / TF: 67-70
2014-06-15sasakiNF
no factor from 2^66 to 2^67
2014-03-19america64NF
no factor from 2^65 to 2^66