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
974213Factored
FactorDigitsBitsDate
18504689283808187691960.72007-09-14 06:58:34
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 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
Verified2017-09-28Oliver Kruse5459CE4C2CA9DC501013
Verified2017-10-15Oliver Kruse5459CE4C2CA9DC50136041913
Verified2017-12-24ATH5459CE4C2CA9DC50115056213
Unverified (Reliable)2020-04-24Oliver KruseCC93982319ABF2__124966653
History
DateUserTypeResult
2020-04-24Oliver KruseC-PRP
M974213/1850468928380818769 : CC93982319ABF2__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-12-24ATHC-PRP
M974213/1850468928380818769 : 5459CE4C2CA9DC50
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-15Oliver KruseC-PRP
M974213/1850468928380818769 : 5459CE4C2CA9DC50
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M974213/1850468928380818769 : 5459CE4C2CA9DC50
PRP: Unverified (Reliable)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=200000, B2=5000000, E=6
2007-09-14Chad DavisF-ECM
Factor: 1850468928380818769