Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
221209Factored
FactorDigitsBitsDate
38490367825.2old
61938521825.92008-07-21 09:14:15
332698337928.32008-07-21 09:14:15
43228662791032.02008-07-21 09:14:15
ECM
DigitsB1Curves
2550000280 / 280
30250000538 / 640
Estimated T-Level: 29.2 ⓘ
TF below 2^92 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-22Oliver KruseBBFD228B3B007C244013
Verified2017-10-12kkmrkkblmbrbkBBFD228B3B007C24421331813
Verified2020-04-17Oliver KruseBB5A931FF5EE4F0C42331553
Verified2024-02-03Wentao HuangBB5A931FF5EE4F0C46616853
History
DateUserTypeResult
2024-02-03slaurCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M221209/38490367/332698337/4322866279/61938521 : BB5A931FF5EE4F0C
PRP proof power = 5
PRP: Verified
Proof certified good
2022-03-07Oliver KruseNF-PM1
B1=30000000, B2=10070832992220
2021-07-14seatseaF-ECM
Factor: 2384036404727207 / (ECM curve 1, B1=250000, B2=38500000, Sigma=5367157786752493)
2021-06-15Oliver KruseNF-PM1
B1=30000000, B2=3000000000
2020-04-17Oliver KruseC-PRP
M221209/38490367/61938521/332698337/4322866279 : BB5A931FF5EE4F0C
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M221209/38490367/332698337/4322866279/61938521 : BBFD228B3B007C24
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M221209/38490367/332698337/4322866279/61938521 : BBFD228B3B007C24
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M221209/38490367/332698337/4322866279/61938521 : BBFD228B3B007C24
PRP without proof (not generated)
2008-07-21J FeitsmaF
Factor: 61938521
2008-07-21J FeitsmaF
Factor: 4322866279
2008-07-21J FeitsmaF
Factor: 332698337