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
220678187Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1152806902982329714332166.62015-10-27 19:57:10
History
DateUserTypeResult
2015-10-27ConductorF
Factor: 115280690298232971433 / TF: 66-67
2013-08-30RichardNF
no factor from 2^65 to 2^66
2011-06-05carlos56NF
no factor from 2^64 to 2^65