Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2855353Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
859103762804411446.3old
930895940745631371756.42015-03-30 11:23:46
ECM
DigitsB1Curves
255000057 / 280
Estimated T-Level: 21.0
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-22Oliver KruseE3AB2C1AB91E74F62284865453
Verified2017-12-07kkmrkkblmbrbkE3AB2C1AB91E74F62222010053
History
DateUserTypeResult
2022-11-18USAFSSNF-PM1
B1=255000, B2=203416290
2017-12-07kkmrkkblmbrbkC-PRP
M2855353/85910376280441/93089594074563137 : E3AB2C1AB91E74F6
PRP: Verified
PRP without proof (not generated)
2017-10-22Oliver KruseC-PRP
M2855353/85910376280441/93089594074563137 : E3AB2C1AB91E74F6
PRP: Verified
PRP without proof (not generated)
2015-03-30TJAOIF
Factor: 93089594074563137 / TF: 56-57