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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
56101Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
508689067427691445.5old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
403000000586 / 4588
Estimated T-Level: 35.6
TF below 2^113 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse7627E892CA700BDE1013
Verified2017-10-13kkmrkkblmbrbk7627E892CA700BDE13538413
Verified2020-04-17Oliver Kruse1B4BEBDED97FFE4E15553553
Verified2024-02-03Wentao Huang1B4BEBDED97FFE4E12644753
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M56101/50868906742769 : 1B4BEBDED97FFE4E
PRP: Verified
PRP without proof (small exponent)
2023-04-23JacobZNF-PM1
B1=620000000, B2=772483476494730
2021-05-03ATHNF-PP1
Start=2/7, B1=15000000, B2=1500000000
2020-04-17Oliver KruseC-PRP
M56101/50868906742769 : 1B4BEBDED97FFE4E
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M56101/50868906742769 : 7627E892CA700BDE
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M56101/50868906742769 : 7627E892CA700BDE
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M56101/50868906742769 : 7627E892CA700BDE
PRP without proof (not generated)
2016-10-02kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12