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
195198869Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
39817293815413772534332271.82016-12-07 19:46:43
History
DateUserTypeResult
2016-12-07Sergey NosovF
Factor: 3981729381541377253433 / TF: 68-72*
2016-09-09GeorgianaNF
no factor from 2^67 to 2^68
2015-09-11ANONYMOUSNF
no factor from 2^66 to 2^67
2013-06-23sasaki3NF
no factor from 2^65 to 2^66
2011-04-20impsNF
no factor from 2^64 to 2^65
2010-08-31monstNF
no factor from 2^63 to 2^64