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

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MnStatusDetails
2222141Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
23669933413111871771961.02011-01-02 01:50:27
ECM
DigitsB1Curves
2550000280 / 280
30250000207 / 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)Martin BirkE7525328547B30AD0
Bad1999-02-14Rod ReedBC86C4CEBBD11772923020
Verified (Factored)1999-06-26Florian LeeberE7525328547B30AD1335314
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-12kkmrkkblmbrbk260ED923939B42551205444153
Verified2017-10-27Oliver Kruse260ED923939B4255196820153
History
DateUserTypeResult
2017-10-27Oliver KruseC-PRP
M2222141/2366993341311187177 : 260ED923939B4255
PRP: Verified
PRP without proof (not generated)
2017-10-12kkmrkkblmbrbkC-PRP
M2222141/2366993341311187177 : 260ED923939B4255
PRP: Verified
PRP without proof (not generated)
2016-05-01alpertronNF-PM1
B1=500000, B2=15000000, E=12
2011-01-02Oscar ÖstlinF
Factor: 2366993341311187177
2010-10-14Oscar ÖstlinNF-PM1
B1=75011
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61