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

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Exponent Range:










MnStatusDetails
65123Factored
FactorDigitsBitsDate
197925485419991444.2old
79610662212948360776561574732892.72016-10-23 17:42:23
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
403000000538 / 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 KruseFD237342616C46F92013
Verified2017-09-21Oliver KruseFD237342616C46F92013
Verified2017-11-06kkmrkkblmbrbkFD237342616C46F922729413
Verified2020-04-17Oliver Kruse0C71764A8565432422292153
Verified2024-02-03Wentao Huang0C71764A8565432422151453
P-1 factors
DateFactorB1B2
2016-10-2379610662212948360776561574731000000002000000000
History
DateUserTypeResult
2024-02-04masserNF-PP1
Start=148/67, B1=25000000, B2=1775000000
2024-02-04masserNF-PP1
Start=6/5, B1=25000000, B2=1775000000
2024-02-03Wentao HuangC-PRP
M65123/19792548541999/7961066221294836077656157473 : 0C71764A85654324
PRP: Verified
PRP without proof (small exponent)
2024-02-02masserNF-PP1
Start=2/7, B1=25000000, B2=1775000000
2022-10-20George WoltmanNF-PM1
B1=1000000000, B2=92381537348100
2020-04-17Oliver KruseC-PRP
M65123/19792548541999/7961066221294836077656157473 : 0C71764A85654324
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M65123/19792548541999/7961066221294836077656157473 : FD237342616C46F9
PRP: Verified
PRP without proof (small exponent)
2017-09-21Oliver KruseC-PRP
M65123/19792548541999/7961066221294836077656157473 : FD237342616C46F9
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M65123/19792548541999/7961066221294836077656157473 : FD237342616C46F9
PRP without proof (not generated)
2016-10-23kkmrkkblmbrbkF-PM1
Factor: 7961066221294836077656157473 / (P-1, B1=100000000, B2=2000000000, E=12)