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

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MnStatusDetails
2297437Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 270
TF target 262
TF below 2^80 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 9600000
B2 = 49498834770
ECM
DigitsB1Curves
2550000280 / 280
3025000094 / 640
Estimated T-Level: 25.7 ⓘ
LL
StatusDateUserResidueShift
Verified1998-11-07Wim de LangeA2649BAB4BB387080
Bad1999-08-16Nathan PorterC600617C5C275884341009
Verified1999-12-01Laszlo MegyeriA2649BAB4BB3870826133
Verified2018-04-24gunhedA2649BAB4BB38708969011
Verified2018-04-30kkmrkkblmbrbkA2649BAB4BB38708460826
History
DateUserTypeResult
2024-03-08TJAOINF
no factor from 2^69 to 2^70
2023-08-25Sid & AndyNF-PM1
B1=9600000, B2=49498834770
2023-07-28JossNF-PM1
B1=1000000, B2=6443965710
2022-09-03Wentao HuangNF-PM1
B1=740000, B2=2861364660
2021-06-10TJAOINF
no factor from 2^68 to 2^69
2019-04-01TJAOINF
no factor from 2^67 to 2^68
2018-04-30kkmrkkblmbrbkC-LL
A2649BAB4BB38708
2018-04-24gunhedC-LL
A2649BAB4BB38708
2017-05-27Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-11-04ramgeisNF
no factor from 2^65 to 2^66
2015-03-12VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-12VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-07HBendtzNF-PM1
B1=615000, B2=12000000, e=12
2014-06-11JossNF-PM1
B1=112937
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-05-12Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-17Oscar ÖstlinNF-PM1
B1=85000, B2=1742500, E=6
2010-12-04Oscar ÖstlinNF-PM1
B1=75011
2010-11-15JossNF-PM1
B1=20000
2010-11-07JossNF-PM1
B1=15000
2009-01-15Sturle SundeNF
no factor from 2^60 to 2^61