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
703957Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
550378077037239531755.6old
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-27Oliver Kruse8CDE89970A6A63501013
Verified2017-09-28Oliver Kruse8CDE89970A6A63501013
Verified2017-11-09kkmrkkblmbrbk8CDE89970A6A6350130554513
Verified2020-04-20Oliver Kruse9BB30A3AF50C52DB113390053
Verified2025-03-15kkmrkkblmbrbk9BB30A3AF50C52DB140126653
History
DateUserTypeResult
2025-03-15featherCERT
PRP Certification
Proof certified good
2025-03-15kkmrkkblmbrbkC-PRP
M703957/55037807703723953 : 9BB30A3AF50C52DB
PRP proof power = 6
PRP: Verified
Proof certified good
2022-12-22USAFSSNF-PM1
B1=1500000, B2=4299875580
2020-04-20Oliver KruseC-PRP
M703957/55037807703723953 : 9BB30A3AF50C52DB
PRP: Verified
PRP without proof (small exponent)
2017-11-09kkmrkkblmbrbkC-PRP
M703957/55037807703723953 : 8CDE89970A6A6350
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M703957/55037807703723953 : 8CDE89970A6A6350
PRP: Verified
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M703957/55037807703723953 : 8CDE89970A6A6350
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12