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

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MnStatusDetails
1996549Factored
FactorDigitsBitsDate
17651101613115143955912270.62020-01-21 12:03:00
ECM
DigitsB1Curves
2550000273 / 280
Estimated T-Level: 24.9
TF below 2^78 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ray Trent2903E0957E34E8650
Verified (Factored)1999-04-13Trevor Green2903E0957E34E865102253
Verified (Factored)2015-07-12MadPoo2903E0957E34E865822518
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-01-22Niels_Mache_Nextcloud84727BFA0E6B70CC1165059753
Verified2020-01-23marssystems84727BFA0E6B70CC162145353
History
DateUserTypeResult
2020-01-23marssystemsC-PRP
M1996549/1765110161311514395591 : 84727BFA0E6B70CC
PRP: Verified
PRP without proof (not generated)
2020-01-22Niels_Mache_NextcloudC-PRP
M1996549/1765110161311514395591 : 84727BFA0E6B70CC
PRP: Verified
PRP without proof (not generated)
2020-01-21mnd9F-ECM
Factor: 1765110161311514395591 / (ECM curve 1, B1=50000, B2=5000000, Sigma=1533203733743092)
2019-05-19chuenkitNF
no factor from 2^67 to 2^68
2018-11-26JossNF-PM1
B1=1996549, B2=249568625, E=12
2018-05-14JossNF-PM1
B1=1996549, B2=199654900, E=12
2018-03-09JossNF-PM1
B1=1996549, B2=120000000, E=12
2018-02-16JossNF-PM1
B1=1996549, B2=60000000, E=12
2018-01-29JossNF-PM1
B1=1996549, B2=30000000, E=12
2017-05-05TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-09-12ramgeisNF
no factor from 2^65 to 2^66
2015-07-12MadPooC-LL
2903E0957E34E865
2015-03-03lycornNF
no factor from 2^64 to 2^65
2015-03-03lycornNF
no factor from 2^63 to 2^64
2011-07-01GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-03-04kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2009-12-06S485122NF
no factor from 2^60 to 2^61