Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2481277Factored
FactorDigitsBitsDate
9578295041583410860312169.72020-07-17 22:48:36
ECM
DigitsB1Curves
255000056 / 280
Estimated T-Level: 21.0 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Johan Viljoen24429FD14D838CCD0
Verified (Factored)1999-05-30Jakob Trier24429FD14D838CCD1527356
Verified (Factored)2018-05-30kkmrkkblmbrbk24429FD14D838CCD1833146
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-07-18M MillerAB2718A210ED3D431179061653
Verified2020-07-22nordiAB2718A210ED3D431242826153
History
DateUserTypeResult
2020-07-22nordiC-PRP
M2481277/957829504158341086031 : AB2718A210ED3D43
PRP: Verified
PRP without proof (not generated)
2020-07-18M MillerC-PRP
M2481277/957829504158341086031 : AB2718A210ED3D43
PRP: Verified
PRP without proof (not generated)
2020-07-17mnd9F-ECM
Factor: 957829504158341086031 / (ECM curve 2, B1=50000, B2=5000000, Sigma=4920341790771873)
2019-07-17TJAOINF
no factor from 2^67 to 2^68
2018-05-30kkmrkkblmbrbkC-LL
24429FD14D838CCD
2017-07-22Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-10-29ramgeisNF
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
2014-11-02mikrNF-PM1
B1=2382500, B2=85770100, E=12
2014-09-02JossNF-PM1
B1=120867
2013-08-21David CampeauNF
no factor from 2^62 to 2^63
2012-06-09Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-21Oscar ÖstlinNF-PM1
B1=95000, B2=1947500, E=6
2010-11-20JossNF-PM1
B1=20000
2009-01-15Sturle SundeNF
no factor from 2^60 to 2^61