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

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MnStatusDetails
2956741Factored
FactorDigitsBitsDate
522913391964657298911592375.52020-12-23 06:25:01
ECM
DigitsB1Curves
255000043 / 280
Estimated T-Level: 20.8
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John Hocking2F6B4D6626329ABF0
Verified (Factored)1999-08-22Jeremy Pharoah2F6B4D6626329ABF1709072
Verified (Factored)2018-10-13kkmrkkblmbrbk2F6B4D6626329ABF306975
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-12-23Maciej Kmieciak3886035DA6046D951272958353
History
DateUserTypeResult
2020-12-24Ben DeloCERT
PRP Certification
Proof certified good
2020-12-23Maciej KmieciakC-PRP
M2956741/52291339196465729891159 : 3886035DA6046D95
PRP proof power = 7
PRP: Verified
Proof certified good
2020-12-23rextheruntF-ECM
Factor: 52291339196465729891159 / (ECM curve 4, B1=50000, B2=5000000)
2018-12-24chuenkitNF
no factor from 2^67 to 2^68
2018-10-13kkmrkkblmbrbkC-LL
2F6B4D6626329ABF
2017-11-28Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-26ramgeisNF
no factor from 2^65 to 2^66
2015-05-02VictordeHollanderNF-PM1
B1=1000000, B2=20000000, E=12
2015-04-29VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-29VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2011-12-12markrNF
no factor from 2^61 to 2^62
2010-11-01markrNF-PM1
B1=95000, B2=1995000, E=6
2009-02-13Sturle SundeNF
no factor from 2^60 to 2^61