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
1726661Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
10359967823.3old
2253830742659505371857.62015-07-06 12:44:36
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-03Oliver KruseBC00C4A13818D21C2013
Verified2017-11-03ATHBC00C4A13818D21C2101016713
History
DateUserTypeResult
2017-11-03ATHC-PRP
M1726661/10359967/225383074265950537 : BC00C4A13818D21C
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1726661/10359967/225383074265950537 : BC00C4A13818D21C
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-07-06TJAOIF
Factor: 225383074265950537 / TF: 57-58