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

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MnStatusDetails
1930823Factored
FactorDigitsBitsDate
123894041825832062246872373.42020-01-20 08:51:35
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)Randy d. Miller6F708EB03533E8CF0
Verified (Factored)1999-01-10Jason Leach6F708EB03533E8CF1583100
Verified (Factored)2015-07-14MadPoo6F708EB03533E8CF196594
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-01-20mrhE8244D1137F13011124594653
Verified2020-01-30krackerE8244D1137F13011195065453
History
DateUserTypeResult
2020-01-30krackerC-PRP
M1930823/12389404182583206224687 : E8244D1137F13011
PRP: Verified
PRP without proof (not generated)
2020-01-20mrhC-PRP
M1930823/12389404182583206224687 : E8244D1137F13011
PRP: Verified
PRP without proof (not generated)
2020-01-20mnd9F-ECM
Factor: 12389404182583206224687 / (ECM curve 1, B1=50000, B2=5000000, Sigma=2057047435340320)
2019-05-09chuenkitNF
no factor from 2^67 to 2^68
2018-02-26TJAOINF
no factor from 2^66 to 2^67
2018-01-28mikrNF-PM1
B1=8000000, B2=320000000, E=12
2018-01-18JossNF-PM1
B1=1930823, B2=30000000, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-04ramgeisNF
no factor from 2^65 to 2^66
2015-07-14MadPooC-LL
6F708EB03533E8CF
2015-05-18omylistNF
no factor from 2^64 to 2^65
2015-05-18omylistNF
no factor from 2^63 to 2^64
2011-09-06kurlyNF-PM1
B1=1000000, B2=30000000
2011-08-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-02-06S485122NF
no factor from 2^60 to 2^61