Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2762671Factored
FactorDigitsBitsDate
240982772800670202045832374.42021-03-30 15:25:18
ECM
DigitsB1Curves
255000086 / 280
Estimated T-Level: 21.5
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Michael B. Clark714004873F6AB7C30
Verified (Factored)1999-09-30Leonid Papirov714004873F6AB7C3445636
Verified (Factored)2018-08-18kkmrkkblmbrbk714004873F6AB7C32271197
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-03-31XZT30D86EB9EDBE7184145418653
History
DateUserTypeResult
2021-04-01riccardo ubertiNF-PM1
B1=5000000, B2=100000000, E=12
2021-03-31curtiscCERT
PRP Certification
Proof certified good
2021-03-31XZTC-PRP
M2762671/24098277280067020204583 : 30D86EB9EDBE7184
PRP proof power = 7
PRP: Verified
Proof certified good
2021-03-30daveward2005F-ECM
Factor: 24098277280067020204583 / (ECM curve 4, B1=50000, B2=5000000)
2019-02-21chuenkitNF
no factor from 2^67 to 2^68
2018-08-18kkmrkkblmbrbkC-LL
714004873F6AB7C3
2017-10-09Gordon SpenceNF
no factor from 2^66 to 2^67
2017-02-25JossNF-PM1
B1=294451, B2=2944510, E=6
2017-01-19mikrNF-PM1
B1=2700000, B2=84000000, E=12
2016-12-23JossNF-PM1
B1=204480
2016-10-26JossNF-PM1
B1=170400
2016-08-08JossNF-PM1
B1=142000, B2=4730000, E=6
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-08ramgeisNF
no factor from 2^65 to 2^66
2015-04-21VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-21VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-03-16markrNF
no factor from 2^61 to 2^62
2010-12-03markrNF-PM1
B1=110000, B2=2365000, E=6
2009-01-31Sturle SundeNF
no factor from 2^60 to 2^61