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

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MnStatusDetails
1521757TF
No factors below 268
TF target 261
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10001000
B2 = 17741407320
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8 ⓘ
LL
StatusDateUserResidueShift
Verified1997-11-12Herb Savage0684C70F9D7C526A0
Verified1999-01-02Lars Lindley0684C70F9D7C526A585480
Verified2015-07-10MadPoo0684C70F9D7C526A1054641
History
DateUserTypeResult
2023-06-26JossNF-PM1
B1=10001000, B2=17741407320
2023-02-21JossNF-PM1
B1=10001000, B2=3563469000
2022-12-22JossNF-PM1
B1=10001000, B2=1200523170
2018-06-06ramgeisNF
no factor from 2^67 to 2^68
2018-03-05TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-09-29ramgeisNF
no factor from 2^65 to 2^66
2015-07-10MadPooC-LL
0684C70F9D7C526A
2015-02-24VictordeHollanderNF-PM1
B1=10000000, B2=200000000, E=12
2015-01-31snme2pm1NF
no factor from 2^64 to 2^65
2015-01-31snme2pm1NF
no factor from 2^63 to 2^64
2013-11-21David CampeauNF-PM1
B1=945000, B2=27405000, E=12
2011-01-29James HeinrichNF-PM1
B1=80000, B2=1340000, E=6
2010-05-04GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-25Architects CubedNF
no factor from 2^60 to 2^61