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

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Exponent Range:










MnStatusDetails
1195121Factored
FactorDigitsBitsDate
101300542281749700792063.12009-09-29 11:09:39
1226439479636309259282277672786.72018-07-27 12:42:13
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 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)Joel Smith21BB58B67A32ECB10
Verified (Factored)C. Harald Koch21BB58B67A32ECB10
Verified (Factored)Ricardo Montiel21BB58B67A32ECB10
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-29Oliver Kruse7C38F67C09C39A3E1013
Verified (Factored)2017-10-17Oliver Kruse7C38F67C09C39A3E139716713
Verified (Factored)2018-01-02ATH7C38F67C09C39A3E1102972113
Verified2018-07-28Gabriel Lignelli0E6B4671E0AFCADF2104426553
Verified2018-07-29kkmrkkblmbrbk0E6B4671E0AFCADF217126453
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^58 to 2^60
2018-07-29kkmrkkblmbrbkC-PRP
M1195121/10130054228174970079/122643947963630925928227767 : 0E6B4671E0AFCADF
PRP: Verified
PRP without proof (not generated)
2018-07-28Gabriel LignelliC-PRP
M1195121/10130054228174970079/122643947963630925928227767 : 0E6B4671E0AFCADF
PRP: Verified
PRP without proof (not generated)
2018-07-27TJAOIF-ECM
Factor: 122643947963630925928227767 / (ECM curve 101, B1=50000, B2=5000000)
2018-01-02ATHC-PRP
M1195121/10130054228174970079 : 7C38F67C09C39A3E
PRP: Verified
PRP without proof (not generated)
2017-10-17Oliver KruseC-PRP
M1195121/10130054228174970079 : 7C38F67C09C39A3E
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1195121/10130054228174970079 : 7C38F67C09C39A3E
PRP: Verified
PRP without proof (not generated)
2009-09-29SubPrimeF-ECM
Factor: 10130054228174970079
2009-02-16Sturle SundeNF
no factor from 2^60 to 2^61