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

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MnStatusDetails
2489719Factored
FactorDigitsBitsDate
1534107650401570648737592477.02020-05-14 18:49:38
ECM
DigitsB1Curves
255000037 / 280
Estimated T-Level: 20.7
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Robert ClarkE8071B0CCD388E200
Verified (Factored)1999-10-21Matthew MetcalfE8071B0CCD388E201802734
Verified (Factored)2018-05-31kkmrkkblmbrbkE8071B0CCD388E201701412
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-05-15mnd971CE6A2D56274C2E1192249453
Verified2020-05-15oodaira71CE6A2D56274C2E1222123453
History
DateUserTypeResult
2020-05-15oodairaC-PRP
M2489719/153410765040157064873759 : 71CE6A2D56274C2E
PRP: Verified
PRP without proof (not generated)
2020-05-15mnd9C-PRP
M2489719/153410765040157064873759 : 71CE6A2D56274C2E
PRP: Verified
PRP without proof (not generated)
2020-05-14nordiF-ECM
Factor: 153410765040157064873759 / (ECM curve 1, B1=50000, B2=5000000, Sigma=764784282845544)
2019-05-13TJAOINF
no factor from 2^67 to 2^68
2018-05-31kkmrkkblmbrbkC-LL
E8071B0CCD388E20
2017-07-24Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-10-30ramgeisNF
no factor from 2^65 to 2^66
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2014-11-24mikrNF-PM1
B1=2382500, B2=85770100, E=12
2014-09-10JossNF-PM1
B1=120780
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-10Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-21Oscar ÖstlinNF-PM1
B1=95000, B2=1947500, E=6
2010-12-22JossNF-PM1
B1=20000
2009-01-15Sturle SundeNF
no factor from 2^60 to 2^61