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
4397287Composite: 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 = 6200000
B2 = 29438922240
ECM
DigitsB1Curves
2550000280 / 280
3025000056 / 640
Estimated T-Level: 25.4 ⓘ
LL
StatusDateUserResidueShift
VerifiedVladimir Ivanovic1FEBF2DAE8AC30010
Verified2000-02-09Upper Silesia1FEBF2DAE8AC3001423282
History
DateUserTypeResult
2022-12-25DRobinsonPENF-PM1
B1=6200000, B2=29438922240
2021-02-11-Anonymous-NF
no factor from 2^72 to 2^73
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
2021-01-25-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-25-Anonymous-NF
no factor from 2^68 to 2^69
2018-12-27Ismo LaitelaNF-PM1
B1=2237739, B2=62656681, E=12
2018-10-30chuenkitNF
no factor from 2^67 to 2^68
2018-05-07chuenkitNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-20snme2pm1NF
no factor from 2^65 to 2^66
2014-08-04lycornNF
no factor from 2^64 to 2^65
2014-08-03JayderNF
no factor from 2^63 to 2^64
2012-02-29GrunwalderGIMPNF
no factor from 2^1 to 2^63
2012-01-13Squeeky_SquirrelNF-PM1
B1=110000, B2=2255000, E=6
2010-11-05markrNF
no factor from 2^61 to 2^62
2009-07-27Carsten KossendeyNF-PM1
B1=25000, B2=356250