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
180221Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
35900023211031.7old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000160 / 1566
Estimated T-Level: 30.5
TF below 2^96 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse4C8923243322CB231013
Verified2017-10-12kkmrkkblmbrbk4C8923243322CB2315261213
Verified2020-04-17Oliver KruseE746F1EC677F63A311501053
Verified2023-08-24USAFSSE746F1EC677F63A31414753
History
DateUserTypeResult
2023-08-24Steve JacobsonCERT
PRP Certification
Proof certified good
2023-08-24USAFSSC-PRP
M180221/3590002321 : E746F1EC677F63A3
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-17Oliver KruseC-PRP
M180221/3590002321 : E746F1EC677F63A3
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M180221/3590002321 : 4C8923243322CB23
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M180221/3590002321 : 4C8923243322CB23
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M180221/3590002321 : 4C8923243322CB23
PRP without proof (not generated)
2017-01-13kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12