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

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Exponent Range:










MnStatusDetails
2941397Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 270
TF target 263
TF below 2^80 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10000000
B2 = 19223759100
ECM
DigitsB1Curves
2550000280 / 280
3025000063 / 640
Estimated T-Level: 25.5 ⓘ
LL
StatusDateUserResidueShift
VerifiedScott KurowskiCAAAA765E315831A0
Verified1999-05-02Goede Schueler/Christoph SteinbeckCAAAA765E315831A956357
Verified2018-10-10kkmrkkblmbrbkCAAAA765E315831A177119
History
DateUserTypeResult
2023-03-24TJAOINF
no factor from 2^69 to 2^70
2022-12-11mikrNF-PM1
B1=10000000, B2=19223759100
2022-11-29JossNF-PM1
B1=1000000, B2=229972050
2021-05-24TJAOINF
no factor from 2^68 to 2^69
2018-12-22chuenkitNF
no factor from 2^67 to 2^68
2018-10-10kkmrkkblmbrbkC-LL
CAAAA765E315831A
2017-11-28Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-24ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-04-30VictordeHollanderNF-PM1
B1=1000000, B2=20000000, E=12
2015-04-25VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-25VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2011-12-27markrNF
no factor from 2^61 to 2^62
2010-11-06markrNF-PM1
B1=105000, B2=2310000, E=6
2009-02-13Sturle SundeNF
no factor from 2^60 to 2^61