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
1968977Factored
FactorDigitsBitsDate
47255449825.5old
7648512773060289491112169.42021-08-17 01:00:40
4845447055595104112444872478.72022-03-19 01:32:29
ECM
DigitsB1Curves
2550000280 / 280
3025000056 / 640
Estimated T-Level: 25.4
TF below 2^80 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-05Oliver Kruse16811BDED442CD851013
Verified (Factored)2017-11-12kkmrkkblmbrbk16811BDED442CD851136001213
Verified (Factored)2021-08-17SRJ2877A19DD8AA927A99402184004153
Verified (Factored)2021-08-17/r/countingA19DD8AA927A99402173024753
Verified2022-03-21_p95holder_A19DD8AA927A99403154604353
History
DateUserTypeResult
2023-10-16USAFSSNF-PM1
B1=672000, B2=647447724
2022-08-12USAFSSNF-PM1
B1=132000, B2=134381520
2022-03-21_p95holder_C-PRP
M1968977/47255449/764851277306028949111/484544705559510411244487 : A19DD8AA927A9940
PRP: Verified
PRP without proof (not generated)
2022-03-19_p95holder_F-ECM
Factor: 484544705559510411244487 / (ECM curve 2, B1=50000, B2=5000000)
2021-08-17Ben DeloCERT
PRP Certification
Proof certified good
2021-08-17John AireyCERT
PRP Certification
Proof certified good
2021-08-17/r/countingC-PRP
M1968977/47255449/764851277306028949111 : A19DD8AA927A9940
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2021-08-17SRJ2877C-PRP
M1968977/47255449/764851277306028949111 : A19DD8AA927A9940
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2021-08-17nordiF-ECM
Factor: 764851277306028949111 / (ECM curve 5, B1=50000, B2=6750000, Sigma=5195766473262074)
2017-11-12kkmrkkblmbrbkC-PRP
M1968977/47255449 : 16811BDED442CD85
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1968977/47255449 : 16811BDED442CD85
PRP: Verified
PRP without proof (not generated)