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
196998947Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
973528349132757242572066.42015-09-18 10:21:53
History
DateUserTypeResult
2015-09-18NickF
Factor: 97352834913275724257 / TF: 66-67
2013-06-30tscNF
no factor from 2^65 to 2^66
2011-04-24Gordon SpenceNF
no factor from 2^64 to 2^65
2010-08-07MarzbugNF
no factor from 2^63 to 2^64