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

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MnStatusDetails
2131373Factored
FactorDigitsBitsDate
1257394209074118944616309292786.72015-08-11 16:17:00
ECM
DigitsB1Curves
2550000120 / 280
Estimated T-Level: 22.1
TF below 2^69 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1997-11-12Herb Savage32129BAB39E581D40
Verified (Factored)1999-02-21Kevin Bennett32129BAB39E581D4915233
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-08Oliver KruseB5CAE4CC6DAEB8071013
Verified2017-11-18kkmrkkblmbrbkB5CAE4CC6DAEB807154921313
History
DateUserTypeResult
2022-03-09LordJuliusNF
no factor from 2^1 to 2^60
2017-11-18kkmrkkblmbrbkC-PRP
M2131373/125739420907411894461630929 : B5CAE4CC6DAEB807
PRP: Verified
PRP without proof (not generated)
2017-10-08Oliver KruseC-PRP
M2131373/125739420907411894461630929 : B5CAE4CC6DAEB807
PRP: Verified
PRP without proof (not generated)
2016-03-19alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-08-11guruF-ECM
Factor: 125739420907411894461630929 / (ECM curve 3, B1=50000, B2=5000000)
2015-03-15VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-15VictordeHollanderNF
no factor from 2^63 to 2^64
2013-09-07ramgeisNF
no factor from 2^62 to 2^63
2012-04-14Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-22James HeinrichNF-PM1
B1=140000, B2=3045000, E=6
2011-01-12JossNF-PM1
B1=50000
2009-01-05Sturle SundeNF
no factor from 2^60 to 2^61