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

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Exponent Range:










MnStatusDetails
354737Factored
FactorDigitsBitsDate
380816683719903315536181832685.02013-07-19 07:44:26
ECM
DigitsB1Curves
2550000280 / 280
30250000200 / 640
Estimated T-Level: 26.6 ⓘ
TF below 2^83 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski19E60
Verified (Factored)Ken KrieselD0B1FEF862FE59E60
Verified (Factored)Brian J. BeesleyD0B1FEF862FE59E60
Verified (Factored)Eivind TrielD0B1FEF862FE59E661327
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-23Oliver Kruse2E14368D77A7C2F11013
Verified2017-10-13Oliver Kruse2E14368D77A7C2F1134033213
Verified2017-12-15ATH2E14368D77A7C2F1111990413
Unverified (Reliable)2020-04-18Oliver Kruse97F2147E0BC39B__15868453
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-18Oliver KruseC-PRP
M354737/38081668371990331553618183 : 97F2147E0BC39B__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-12-15ATHC-PRP
M354737/38081668371990331553618183 : 2E14368D77A7C2F1
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M354737/38081668371990331553618183 : 2E14368D77A7C2F1
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M354737/38081668371990331553618183 : 2E14368D77A7C2F1
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-23Oliver KruseC-PRP
M354737/38081668371990331553618183 : 2E14368D77A7C2F1
PRP without proof (not generated)
2013-07-19SRJ2877F-ECM
Factor: 38081668371990331553618183
2013-05-21lycornNF
no factor from 2^60 to 2^61
2012-03-02alpertronNF-PM1
B1=10000000, B2=200000000, E=12
2011-08-09JossNF-PM1
B1=1273565
2009-01-26Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-29Sturle SundeNF
no factor from 2^58 to 2^59