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

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MnStatusDetails
1581053Factored
FactorDigitsBitsDate
2693156302722267533229672477.82015-09-09 18:40:14
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Jeff CareyB1155D7850F7B3F80
Verified (Factored)1998-11-28Roger SmithB1155D7850F7B3F8426281
Verified (Factored)2015-07-03MadPooB1155D7850F7B3F81267225
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-02Oliver Kruse3F71E4A2A694A0CC1013
Verified2017-10-31kkmrkkblmbrbk3F71E4A2A694A0CC191307913
History
DateUserTypeResult
2017-10-31kkmrkkblmbrbkC-PRP
M1581053/269315630272226753322967 : 3F71E4A2A694A0CC
PRP: Verified
PRP without proof (not generated)
2017-10-02Oliver KruseC-PRP
M1581053/269315630272226753322967 : 3F71E4A2A694A0CC
PRP: Verified
PRP without proof (not generated)
2015-09-09Chang Chia-TcheF-ECM
Factor: 269315630272226753322967 / (ECM curve 3, B1=50000, B2=5000000)
2015-07-03MadPooC-LL
B1155D7850F7B3F8
2015-04-05VictordeHollanderNF-PM1
B1=10000000, B2=200000000, E=12
2015-03-02snme2pm1NF
no factor from 2^64 to 2^65
2015-03-02snme2pm1NF
no factor from 2^63 to 2^64
2013-12-15David CampeauNF-PM1
B1=970000, B2=28130000, E=12
2011-02-02James HeinrichNF-PM1
B1=85000, B2=1402500, E=6
2010-06-14GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-05-04Architects CubedNF
no factor from 2^60 to 2^61