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
2265421Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
2358891500216871547.7old
152985151846732571753.82014-10-10 11:45:14
ECM
DigitsB1Curves
2550000280 / 280
30250000163 / 640
Estimated T-Level: 26.3
TF below 2^82 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-11Oliver Kruse72351ABB95CED8722013
Verified2017-11-21kkmrkkblmbrbk72351ABB95CED872252257113
History
DateUserTypeResult
2017-11-21kkmrkkblmbrbkC-PRP
M2265421/235889150021687/15298515184673257 : 72351ABB95CED872
PRP: Verified
PRP without proof (not generated)
2017-10-11Oliver KruseC-PRP
M2265421/235889150021687/15298515184673257 : 72351ABB95CED872
PRP: Verified
PRP without proof (not generated)
2016-04-21alpertronNF-PM1
B1=500000, B2=15000000, E=12
2014-10-10TJAOIF
Factor: 15298515184673257 / TF: 53-54