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
4371067Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 265
TF below 2^73 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 6200000
B2 = 32756371830
ECM
DigitsB1Curves
2550000194 / 280
Estimated T-Level: 23.5 ⓘ
LL
StatusDateUserResidueShift
Verified1998-06-20Bruce Mitchell6730B974A020C0A40
Verified1999-11-04Tim Towers6730B974A020C0A42669045
History
DateUserTypeResult
2022-12-17DRobinsonPENF-PM1
B1=6200000, B2=32756371830
2021-01-30-Anonymous-NF
no factor from 2^71 to 2^72
2021-01-30-Anonymous-NF
no factor from 2^70 to 2^71
2021-01-26-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-26-Anonymous-NF
no factor from 2^68 to 2^69
2018-10-29chuenkitNF
no factor from 2^67 to 2^68
2018-10-24Ismo LaitelaNF-PM1
B1=2189464, B2=63494458, E=12
2018-05-03chuenkitNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-18snme2pm1NF
no factor from 2^65 to 2^66
2014-07-11lycornNF
no factor from 2^64 to 2^65
2014-07-11JayderNF
no factor from 2^63 to 2^64
2012-02-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2012-01-03Squeeky_SquirrelNF-PM1
B1=110000, B2=2255000, E=6
2010-11-16markrNF
no factor from 2^61 to 2^62
2009-09-02Carsten KossendeyNF-PM1
B1=25000, B2=356250