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
48121Factored
FactorDigitsBitsDate
327126559928.3old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
403000000605 / 4588
Estimated T-Level: 35.7
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 Kruse9A089C08AE26A5121013
Verified2017-10-13kkmrkkblmbrbk9A089C08AE26A51211173713
Verified2020-04-17Oliver KruseC8861B9505D60A2F1527253
Verified2021-03-22_p95holder_C8861B9505D60A2F11620253
History
DateUserTypeResult
2023-05-04JacobZNF-PM1
B1=740000000, B2=601232716784700
2021-03-22_p95holder_C-PRP
M48121/327126559 : C8861B9505D60A2F
PRP: Verified
PRP without proof (small exponent)
2021-03-22ConductorF-ECM
Factor: 327126559 / (ECM curve 1, B1=1000000, B2=100000000, Sigma=4538314602271272)
2020-04-17Oliver KruseC-PRP
M48121/327126559 : C8861B9505D60A2F
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M48121/327126559 : 9A089C08AE26A512
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M48121/327126559 : 9A089C08AE26A512
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M48121/327126559 : 9A089C08AE26A512
PRP without proof (not generated)
2016-09-30kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12