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
4383697Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 265
P-1
B1 = 6200000
B2 = 28879919250
ECM
DigitsB1Curves
2550000153 / 280
Estimated T-Level: 22.7 ⓘ
LL
StatusDateUserResidueShift
VerifiedDax PratherEF7BB9BEFAC929660
Verified2000-08-10Stephen WoodEF7BB9BEFAC929663316827
History
DateUserTypeResult
2022-12-22DRobinsonPENF-PM1
B1=6200000, B2=28879919250
2021-02-11-Anonymous-NF
no factor from 2^72 to 2^73
2021-01-31-Anonymous-NF
no factor from 2^71 to 2^72
2021-01-31-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
2018-10-29chuenkitNF
no factor from 2^67 to 2^68
2018-05-04chuenkitNF
no factor from 2^66 to 2^67
2017-04-24Squeeky_SquirrelNF-PM1
B1=270000, B2=7897500, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-20snme2pm1NF
no factor from 2^65 to 2^66
2014-07-21lycornNF
no factor from 2^64 to 2^65
2014-07-21JayderNF
no factor from 2^63 to 2^64
2012-02-29GrunwalderGIMPNF
no factor from 2^1 to 2^63
2012-01-08Squeeky_SquirrelNF-PM1
B1=110000, B2=2255000, E=6
2010-11-12markrNF
no factor from 2^61 to 2^62
2009-08-11Carsten KossendeyNF-PM1
B1=25000, B2=356250