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

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MnStatusDetails
4939751Factored
FactorDigitsBitsDate
121820240954859661335112572012993.32014-12-05 12:35:42
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-05-23Karl Lillevold6BABE734AF61E3110
Verified (Factored)2000-04-05Erik Alvis6BABE734AF61E3111393223
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbk37BC9CB7BCDE108D1013
Verified2018-04-13ATH37BC9CB7BCDE108D1302713
P-1 factors
DateFactorB1B2
2014-12-0512182024095485966133511257201120000039750000
History
DateUserTypeResult
2018-04-13ATHC-PRP
M4939751/12182024095485966133511257201 : 37BC9CB7BCDE108D
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4939751/12182024095485966133511257201 : 37BC9CB7BCDE108D
PRP: Verified
PRP without proof (not generated)
2014-12-05mikrF-PM1
Factor: 12182024095485966133511257201 / (P-1, B1=1200000, B2=39750000, E=12)
2011-09-28GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-07-18Squeeky_SquirrelNF-PM1
B1=60000, B2=960000, E=6
2010-03-21markrNF
no factor from 2^61 to 2^62
2009-09-14Carsten KossendeyNF-PM1
B1=30000, B2=435000