Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
1909703Factored
FactorDigitsBitsDate
3126454240554037814900412478.02020-04-08 14:21:33
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)James TunnicliffeF55D22EDA9D27AA70
Verified (Factored)1999-01-17Justin KellermanF55D22EDA9D27AA71311448
Verified (Factored)2015-07-14MadPooF55D22EDA9D27AA71621920
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-04-08M Miller85A2BE5352F6586A1173225953
Verified2020-04-11GAN85A2BE5352F6586A187722653
History
DateUserTypeResult
2020-04-11GANC-PRP
M1909703/312645424055403781490041 : 85A2BE5352F6586A
PRP: Verified
PRP without proof (not generated)
2020-04-08M MillerC-PRP
M1909703/312645424055403781490041 : 85A2BE5352F6586A
PRP: Verified
PRP without proof (not generated)
2020-04-08KeysarecoolF-ECM
Factor: 312645424055403781490041 / (ECM curve 2, B1=50000, B2=5000000, Sigma=3457673439644061)
2019-04-27chuenkitNF
no factor from 2^67 to 2^68
2017-12-06mikrNF-PM1
B1=8000000, B2=320000000, E=12
2017-03-15Smok_bmv NF
no factor from 2^66 to 2^67
2015-09-01ramgeisNF
no factor from 2^65 to 2^66
2015-07-14MadPooC-LL
F55D22EDA9D27AA7
2015-05-19monstNF
no factor from 2^64 to 2^65
2015-05-18omylistNF
no factor from 2^63 to 2^64
2011-06-14kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2011-03-07GrunwalderGIMPNF
no factor from 2^62 to 2^63
2011-03-07GrunwalderGIMPNF
no factor from 2^61 to 2^62
2009-05-27Architects CubedNF
no factor from 2^60 to 2^61