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
4205779Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 265
TF below 2^74 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 6200000
B2 = 15965654250
ECM
DigitsB1Curves
2550000213 / 280
Estimated T-Level: 23.8 ⓘ
LL
StatusDateUserResidueShift
Verified1998-03-03Brian Schroeder & Aaron Koller2ABF64A3729BA5D50
Verified1999-12-23Chris Peters2ABF64A3729BA5D5524173
History
DateUserTypeResult
2022-04-01DRobinsonPENF-PM1
B1=6200000, B2=15965654250
2021-04-30Dylan DelgadoNF-PM1
B1=2000000, B2=172000000
2021-01-25-Anonymous-NF
no factor from 2^71 to 2^72
2021-01-23-Anonymous-NF
no factor from 2^70 to 2^71
2021-01-22-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-22-Anonymous-NF
no factor from 2^68 to 2^69
2018-12-15YxinityNF
no factor from 2^67 to 2^68
2018-11-09chuenkitNF
no factor from 2^67 to 2^68
2017-12-27YxinityNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-07-25David CampeauNF-PM1
B1=1145000, B2=30915000, E=12
2015-06-07snme2pm1NF
no factor from 2^65 to 2^66
2013-11-19David CampeauNF
no factor from 2^64 to 2^65
2013-11-06JayderNF
no factor from 2^63 to 2^64
2012-01-19GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-12-05Squeeky_SquirrelNF-PM1
B1=75000, B2=1368750, E=6
2011-08-10Squeeky_SquirrelNF-PM1
B1=50000, B2=737500, E=6
2011-01-25markrNF
no factor from 2^61 to 2^62
2009-08-04Carsten KossendeyNF-PM1
B1=25000, B2=337500