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

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MnStatusDetails
2971559Factored
FactorDigitsBitsDate
932880501592099745296721512686.32021-06-28 13:34:35
ECM
DigitsB1Curves
255000076 / 280
Estimated T-Level: 21.4
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John Fray644BA1AC5986308B0
Verified (Factored)1999-08-16Jörg Thomsen644BA1AC5986308B1686264
Verified (Factored)2018-10-18kkmrkkblmbrbk644BA1AC5986308B2282863
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-06-29marssystemsE3BA2533AEEF3FDD1156862453
History
DateUserTypeResult
2021-06-29rduerrCERT
PRP Certification
Proof certified good
2021-06-29marssystemsC-PRP
M2971559/93288050159209974529672151 : E3BA2533AEEF3FDD
PRP proof power = 7
PRP: Verified
Proof certified good
2021-06-28kutensF-ECM
Factor: 93288050159209974529672151 / (ECM curve 2, B1=50000, B2=6350000, Sigma=5647951741497183)
2021-05-17TJAOINF
no factor from 2^68 to 2^69
2018-12-25chuenkitNF
no factor from 2^67 to 2^68
2018-10-18kkmrkkblmbrbkC-LL
644BA1AC5986308B
2017-12-03Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-28ramgeisNF
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
2011-11-29Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-10-27markrNF-PM1
B1=95000, B2=1995000, E=6
2009-02-12Sturle SundeNF
no factor from 2^60 to 2^61