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

PrimeNet Exponent Status

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MnStatusDetails
2023121Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
206358343927.6old
ECM
DigitsB1Curves
2550000280 / 280
30250000131 / 640
Estimated T-Level: 26.0
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-06Oliver Kruse8AF5828AC9C9B8921013
Verified2017-11-14kkmrkkblmbrbk8AF5828AC9C9B892139076713
History
DateUserTypeResult
2017-11-14kkmrkkblmbrbkC-PRP
M2023121/206358343 : 8AF5828AC9C9B892
PRP: Verified
PRP without proof (not generated)
2017-10-06Oliver KruseC-PRP
M2023121/206358343 : 8AF5828AC9C9B892
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12