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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
4453121Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 265
TF below 2^80 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 6400000
B2 = 10286095050
ECM
DigitsB1Curves
2550000280 / 280
3025000064 / 640
Estimated T-Level: 25.5 ⓘ
LL
StatusDateUserResidueShift
Verified1998-07-29John Lambert3A79F1903446DDD00
Verified1999-12-23Steve Justiss3A79F1903446DDD04058014
History
DateUserTypeResult
2024-11-17TheJudgerNF
no factor from 2^72 to 2^73
2024-11-17TheJudgerNF
no factor from 2^71 to 2^72
2023-02-23Sid & AndyNF-PM1
B1=6400000, B2=10286095050
2021-08-22SRBaseNF
no factor from 2^70 to 2^71
2021-08-19SRBaseNF
no factor from 2^69 to 2^70
2021-07-30JossNF
no factor from 2^68 to 2^69
2018-06-26ramgeisNF
no factor from 2^67 to 2^68
2018-06-26ramgeisNF
no factor from 2^66 to 2^67
2016-12-06mikrNF-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
2014-09-15monstNF
no factor from 2^64 to 2^65
2014-09-15JayderNF
no factor from 2^63 to 2^64
2012-05-09Squeeky_SquirrelNF-PM1
B1=135000, B2=2733750, E=6
2012-02-03GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-10-12markrNF
no factor from 2^61 to 2^62
2009-07-21Carsten KossendeyNF-PM1
B1=25000, B2=362500