Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
73546481Tested as composite (unverified): unconfirmed Lucas-Lehmer test says not-prime
TF
No factors below 277
TF target 274
P-1
B1 = 615000
B2 = 12146250
LL
StatusDateUserResidueShift
Unverified2016-07-06rick8BB06138FECECC__22250471
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2024-07-04-Anonymous-LL double-checkLL95.72 % 2025-06-02
History
DateUserTypeResult
2020-10-23-Anonymous-NF
no factor from 2^76 to 2^77
2020-10-09-Anonymous-NF
no factor from 2^75 to 2^76
2016-07-06rickC-LL
8BB06138FECECC__
2016-03-31Mark RoseNF
no factor from 2^57 to 2^64
2015-10-31Judge HaleNF-PM1
B1=615000, B2=12146250, E=12
2015-10-21AirSquirrelsNF
no factor from 2^74 to 2^75
2015-10-21AirSquirrelsNF
no factor from 2^73 to 2^74
2015-09-22RichD0NF
no factor from 2^72 to 2^73
2015-04-19srow7NF
no factor from 2^71 to 2^72
2013-08-02SMoffatNF
no factor from 2^70 to 2^71
2012-10-25-Anonymous-NF
no factor from 2^69 to 2^70
2010-09-28arnaudNF
no factor from 2^68 to 2^69
2010-09-22GrunwalderGIMPNF
no factor from 2^67 to 2^68
2010-09-21GrunwalderGIMPNF
no factor from 2^66 to 2^67
2010-09-20oodairaNF
no factor from 2^65 to 2^66
2010-06-07GrunwalderGIMPNF
no factor from 2^64 to 2^65