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

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MnStatusDetails
4493081Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
19769556411030.9old
179633378391134.12008-09-07 23:41:32
349419282740893656472064.92018-03-07 13:50:34
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
Verified (Factored)2017-09-20kkmrkkblmbrbkDEE821D113E8BCFC2013
Verified (Factored)2018-02-17Oliver KruseDEE821D113E8BCFC284295813
Verified2018-03-07ATHFEBA379C90E3B19B3190157753
Verified2018-03-09Oliver KruseFEBA379C90E3B19B3433021653
History
DateUserTypeResult
2023-07-28USAFSSNF-PM1
B1=336000, B2=158258100
2018-03-09Oliver KruseC-PRP
M4493081/1976955641/17963337839/34941928274089365647 : FEBA379C90E3B19B
PRP: Verified
PRP without proof (not generated)
2018-03-07ATHC-PRP
M4493081/1976955641/17963337839/34941928274089365647 : FEBA379C90E3B19B
PRP: Verified
PRP without proof (not generated)
2018-03-07TJAOIF
Factor: 34941928274089365647 / TF: 64-65
2018-02-17Oliver KruseC-PRP
M4493081/1976955641/17963337839 : DEE821D113E8BCFC
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4493081/17963337839/1976955641 : DEE821D113E8BCFC
PRP: Verified
PRP without proof (not generated)
2008-09-07Will EdgingtonF
Factor: 17963337839