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
3400247Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
193138449921111444.1old
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-11-05Oliver KruseDDB138A158F8644C115189153
Verified2017-12-16kkmrkkblmbrbkDDB138A158F8644C181711253
History
DateUserTypeResult
2022-09-05JossNF-PM1
B1=1133415, B2=213444000
2022-01-06JossNF-PM1
B1=1133415, B2=111642300
2021-05-15JossNF
no factor from 2^67 to 2^68
2020-12-21JossNF-PM1
B1=340024, B2=3400247, E=6
2017-12-16kkmrkkblmbrbkC-PRP
M3400247/19313844992111 : DDB138A158F8644C
PRP: Verified
PRP without proof (not generated)
2017-11-05Oliver KruseC-PRP
M3400247/19313844992111 : DDB138A158F8644C
PRP: Verified
PRP without proof (not generated)