Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2346791Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
21204336208871340.9old
ECM
DigitsB1Curves
2550000167 / 280
Estimated T-Level: 23.0
TF below 2^71 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-12Oliver KruseB417EE77527230A31013
Verified2017-11-24storm5510B417EE77527230A3172407413
History
DateUserTypeResult
2018-03-18alpertronNF-PM1
B1=500000, B2=15000000, E=12
2017-11-24storm5510C-PRP
M2346791/2120433620887 : B417EE77527230A3
PRP: Verified
PRP without proof (not generated)
2017-10-12Oliver KruseC-PRP
M2346791/2120433620887 : B417EE77527230A3
PRP: Verified
PRP without proof (not generated)