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
5208923Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 266
TF below 2^80 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 13596000
B2 = 252731819340
ECM
DigitsB1Curves
2550000280 / 280
3025000060 / 640
Estimated T-Level: 25.5 ⓘ
LL
StatusDateUserResidueShift
VerifiedJim Fare7DFAC832D282D2380
Verified2000-06-11David Brunberg7DFAC832D282D2381924808
History
DateUserTypeResult
2025-01-28Jason LynchNF-PM1
B1=13596000, B2=252731819340
2024-07-30tbusbyNF
no factor from 2^72 to 2^73
2021-09-17SRBaseNF
no factor from 2^71 to 2^72
2021-09-09axnNF-PM1
B1=8000000, B2=400000000
2021-08-22SRBaseNF
no factor from 2^70 to 2^71
2021-08-18SRBaseNF
no factor from 2^69 to 2^70
2020-12-08TJAOINF
no factor from 2^68 to 2^69
2018-06-17ramgeisNF
no factor from 2^67 to 2^68
2018-04-10Squeeky_SquirrelNF-PM1
B1=310000, B2=9222500, E=12
2016-05-28Gordon SpenceNF
no factor from 2^66 to 2^67
2015-08-10snme2pm1NF
no factor from 2^65 to 2^66
2014-12-19VictordeHollanderNF
no factor from 2^64 to 2^65
2014-12-19VictordeHollanderNF
no factor from 2^63 to 2^64
2010-06-07Squeeky_SquirrelNF-PM1
B1=60000, B2=975000, E=6
2009-08-23Carsten KossendeyNF-PM1
B1=25000, B2=337500
2009-06-18GrunwalderGIMPNF
no factor from 2^62 to 2^63