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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
37747Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
642740750765291445.9old
3907788312468274071858.42009-04-01 16:23:25
1239181882645315755855068392786.72015-09-25 07:43:49
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000001204 / 4588
Estimated T-Level: 36.3
TF below 2^116 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseC248B6D48B16C3A43013
Verified2017-10-02kkmrkkblmbrbkC248B6D48B16C3A43013
Verified2017-12-07ATHC248B6D48B16C3A431449113
Verified2020-04-17Oliver KruseA4B0BD8F87A96180312853
Verified2024-07-01kkmrkkblmbrbkA4B0BD8F87A9618032632553
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M37747/123918188264531575585506839/390778831246827407/64274075076529 : A4B0BD8F87A96180
PRP: Verified
PRP without proof (small exponent)
2022-08-24nordiNF-PM1
B1=2000000000, B2=408370353971580
2022-04-27nordiNF-PM1
B1=2000000000
2021-05-14ATHNF-PP1
Start=2/7, B1=100000000, B2=10000000000
2020-04-17Oliver KruseC-PRP
M37747/64274075076529/390778831246827407/123918188264531575585506839 : A4B0BD8F87A96180
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M37747/64274075076529/390778831246827407/123918188264531575585506839 : C248B6D48B16C3A4
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M37747/64274075076529/390778831246827407/123918188264531575585506839 : C248B6D48B16C3A4
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M37747/64274075076529/390778831246827407/123918188264531575585506839 : C248B6D48B16C3A4
PRP without proof (not generated)
2016-11-02kkmrkkblmbrbkNF-PM1
B1=200000000, B2=5000000000, E=12
2015-09-25James HintzF-ECM
Factor: 123918188264531575585506839 / (ECM curve 389, B1=250000, B2=25000000)
2009-04-01Matthias WurtingerF-ECM
Factor: 390778831246827407