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

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MnStatusDetails
1822981Factored
FactorDigitsBitsDate
533116255156224247124392375.52020-07-19 06:14:08
ECM
DigitsB1Curves
2550000280 / 280
30250000108 / 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)Ken KrieselFB7842A37B7901740
Verified (Factored)1998-12-21Paul Victor NovareseFB7842A37B7901741094074
Verified (Factored)2015-06-27MadPooFB7842A37B7901741057569
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-07-19M MillerF3FB37926120E3151179367353
Verified2020-07-20pewF3FB37926120E3151170337253
History
DateUserTypeResult
2020-07-20pewC-PRP
M1822981/53311625515622424712439 : F3FB37926120E315
PRP: Verified
PRP without proof (not generated)
2020-07-19M MillerC-PRP
M1822981/53311625515622424712439 : F3FB37926120E315
PRP: Verified
PRP without proof (not generated)
2020-07-19GANF-ECM
Factor: 53311625515622424712439 / (ECM curve 3, B1=50000, B2=5000000, Sigma=8017068070697865)
2018-08-21JossNF-PM1
B1=1822981, B2=182298100, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-11-13ramgeisNF
no factor from 2^70 to 2^71
2015-06-27MadPooC-LL
FB7842A37B790174
2015-06-08mikrNF-PM1
B1=2780000, B2=91760000, E=12
2014-09-22JossNF-PM1
B1=170416
2014-05-19JossNF-PM1
B1=135208
2014-01-04Never Odd Or EvenNF
no factor from 2^69 to 2^70
2014-01-04Never Odd Or EvenNF
no factor from 2^68 to 2^69
2014-01-04Never Odd Or EvenNF
no factor from 2^67 to 2^68
2014-01-04Never Odd Or EvenNF
no factor from 2^66 to 2^67
2014-01-04Never Odd Or EvenNF
no factor from 2^65 to 2^66
2011-05-07XyzzyNF
no factor from 2^64 to 2^65
2011-05-07XyzzyNF
no factor from 2^63 to 2^64
2011-02-09Carsten KossendeyNF-PM1
B1=100000, B2=1675000, E=6
2011-01-21GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-11Architects CubedNF
no factor from 2^60 to 2^61