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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
4454921Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 265
TF below 2^76 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 6400000
B2 = 10286095050
ECM
DigitsB1Curves
2550000240 / 280
Estimated T-Level: 24.3 ⓘ
LL
StatusDateUserResidueShift
Bad1998-06-20Tony Hansen097D9DF2012DC8490
Verified2000-02-23Joe Aquilina55981F41A05413F12874081
Verified2002-01-02Rick Lavoie55981F41A05413F12391741
History
DateUserTypeResult
2024-11-17TheJudgerNF
no factor from 2^72 to 2^73
2024-11-17TheJudgerNF
no factor from 2^71 to 2^72
2023-02-24Sid & AndyNF-PM1
B1=6400000, B2=10286095050
2021-08-25krackerNF
no factor from 2^70 to 2^71
2021-08-22SRBaseNF
no factor from 2^69 to 2^70
2021-07-31JossNF
no factor from 2^68 to 2^69
2018-06-25ramgeisNF
no factor from 2^67 to 2^68
2018-06-25ramgeisNF
no factor from 2^66 to 2^67
2016-12-11mikrNF-PM1
B1=1800000, B2=68000000, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-24snme2pm1NF
no factor from 2^65 to 2^66
2014-09-16monstNF
no factor from 2^64 to 2^65
2014-09-15JayderNF
no factor from 2^63 to 2^64
2012-02-03GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-10-15markrNF
no factor from 2^61 to 2^62
2010-09-30Oscar ÖstlinNF-PM1
B1=90000, B2=1935000, E=6