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
42608081Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 276
TF target 272
P-1
B1 = 2000000
B2 = 60000000
ECM
DigitsB1Curves
255000015 / 280
Estimated T-Level: 20.3 ⓘ
LL
StatusDateUserResidueShift
Verified2010-12-28BBQd IguanaFA79E43FC6F295AD24372034
Verified2016-11-09baseyFA79E43FC6F295AD16019065
Verified2017-04-24-Anonymous-FA79E43FC6F295AD5152289
History
DateUserTypeResult
2021-11-06One ManNF-PP1
Start=6/5, B1=600000, B2=13800000
2021-08-31One ManNF-PP1
Start=2/7, B1=600000, B2=21600000
2021-06-30-Anonymous-NF
no factor from 2^75 to 2^76
2021-06-29Yves de WandelaarNF
no factor from 2^74 to 2^75
2020-08-22ViliamFNF-PM1
B1=2000000, B2=60000000
2018-08-23ChuckNF
no factor from 2^72 to 2^74
2017-04-24-Anonymous-C-LL
FA79E43FC6F295AD
2016-11-09baseyC-LL
FA79E43FC6F295AD
2015-08-30-Anonymous-NF
no factor from 2^71 to 2^72
2015-03-10NickOfTimeNF
no factor from 2^70 to 2^71
2015-02-19chalsallNF
no factor from 2^69 to 2^70
2013-12-28LaurVNF
no factor from 2^68 to 2^69
2010-12-28BBQd IguanaC-LL
FA79E43FC6F295AD
2010-02-11-Anonymous-NF-PM1
B1=715000