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
197481049Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1336219328736009061672166.92015-09-19 09:46:41
History
DateUserTypeResult
2015-09-19NickF
Factor: 133621932873600906167 / TF: 66-67
2013-07-02Massimo Cappelli (ik5pwa)NF
no factor from 2^65 to 2^66
2011-04-24Sergej LevinNF
no factor from 2^64 to 2^65
2010-08-08Torchwood InstituteNF
no factor from 2^63 to 2^64