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
260573Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
27031843031031.3old
281152225088507748145725912684.52016-10-24 06:12:12
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000232 / 1566
Estimated T-Level: 30.7
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver KruseC5FCF352E33933E72013
Verified2017-10-12kkmrkkblmbrbkC5FCF352E33933E7218711813
Verified2020-04-17Oliver Kruse674CBB9BBD189DAF214935853
Verified2024-07-28kkmrkkblmbrbk674CBB9BBD189DAF2198853
P-1 factors
DateFactorB1B2
2016-10-242811522250885077481457259150000000
History
DateUserTypeResult
2024-07-28Luke DurantCERT
PRP Certification
Proof certified good
2024-07-28kkmrkkblmbrbkC-PRP
M260573/2703184303/28115222508850774814572591 : 674CBB9BBD189DAF
PRP proof power = 5
PRP: Verified
Proof certified good
2022-05-03Oliver KruseNF-PM1
B1=30000000, B2=10035812696910
2021-09-13Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2020-04-17Oliver KruseC-PRP
M260573/2703184303/28115222508850774814572591 : 674CBB9BBD189DAF
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M260573/2703184303/28115222508850774814572591 : C5FCF352E33933E7
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M260573/2703184303/28115222508850774814572591 : C5FCF352E33933E7
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M260573/2703184303/28115222508850774814572591 : C5FCF352E33933E7
PRP without proof (not generated)
2016-10-24kkmrkkblmbrbkF-PM1
Factor: 28115222508850774814572591 / (P-1, B1=5000000)