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

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Exponent Range:










MnStatusDetails
1920283Factored
FactorDigitsBitsDate
23141991409664191818482092580.92019-12-12 02:55:58
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)Kevin Jaget6BEE46E2D3B458120
Verified (Factored)1999-06-15Chris Carlin6BEE46E2D3B458121004158
Verified (Factored)2015-07-10MadPoo6BEE46E2D3B458121384407
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2019-12-12Niels_Mache_Nextcloud4E28B112E9981C991130813553
Verified2019-12-17Chang Chia-Tche4E28B112E9981C991107968753
History
DateUserTypeResult
2019-12-17Chang Chia-TcheC-PRP
M1920283/2314199140966419181848209 : 4E28B112E9981C99
PRP: Verified
PRP without proof (not generated)
2019-12-12Niels_Mache_NextcloudC-PRP
M1920283/2314199140966419181848209 : 4E28B112E9981C99
PRP: Verified
PRP without proof (not generated)
2019-12-12KeysarecoolF-ECM
Factor: 2314199140966419181848209 / (ECM curve 3, B1=50000, B2=5000000, Sigma=42873037750981)
2019-04-28chuenkitNF
no factor from 2^67 to 2^68
2018-06-04TJAOINF
no factor from 2^66 to 2^67
2018-01-07mikrNF-PM1
B1=8000000, B2=320000000, 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
2015-09-02ramgeisNF
no factor from 2^65 to 2^66
2015-07-10MadPooC-LL
6BEE46E2D3B45812
2015-05-17snme2pm1NF
no factor from 2^64 to 2^65
2015-05-17snme2pm1NF
no factor from 2^63 to 2^64
2011-08-31kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2011-08-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2009-06-02Architects CubedNF
no factor from 2^60 to 2^61