Marin Mersenne 2^P-1
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Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
191669Factored
FactorDigitsBitsDate
20336785488366468583192270.82009-06-04 14:31:44
539258281773095814475881691672995.42020-07-03 22:00:18
ECM
DigitsB1Curves
2550000280 / 280
30250000625 / 640
Estimated T-Level: 29.9
TF below 2^94 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Amdahl 6 - 19890BEF7E5E0
Verified (Factored)Martin Eibl8A4DF7858BEF7E5E0
Verified (Factored)Brian J. Beesley8A4DF7858BEF7E5E0
Verified (Factored)Eivind Triel8A4DF7858BEF7E5E69671
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-22Oliver Kruse0EB826A2DB66EAF81013
Verified (Factored)2017-10-12kkmrkkblmbrbk0EB826A2DB66EAF816867513
Verified (Factored)2020-04-17Oliver Kruse9B9FB6B15E7DB5D4112897253
Verified2020-07-03M Miller9B9FB6B15E7DB5D4214997553
Verified2023-08-24USAFSS9B9FB6B15E7DB5D422516753
History
DateUserTypeResult
2023-08-24Richard KintCERT
PRP Certification
Proof certified good
2023-08-24USAFSSC-PRP
M191669/2033678548836646858319/53925828177309581447588169167 : 9B9FB6B15E7DB5D4
PRP proof power = 5
PRP: Verified
Proof certified good
2022-03-07LordJuliusNF
no factor from 2^57 to 2^58
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-07-03M MillerC-PRP
M191669/2033678548836646858319/53925828177309581447588169167 : 9B9FB6B15E7DB5D4
PRP: Verified
PRP without proof (small exponent)
2020-07-03nordiF-ECM
Factor: 53925828177309581447588169167 / (ECM curve 20, B1=250000, B2=25000000, Sigma=1635703746073854)
2020-04-17Oliver KruseC-PRP
M191669/2033678548836646858319 : 9B9FB6B15E7DB5D4
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M191669/2033678548836646858319 : 0EB826A2DB66EAF8
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M191669/2033678548836646858319 : 0EB826A2DB66EAF8
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M191669/2033678548836646858319 : 0EB826A2DB66EAF8
PRP without proof (not generated)
2017-07-29kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2009-06-04-Anonymous-F-ECM
Factor: 2033678548836646858319
2009-02-02axnNF-PM1
B1=5000000, B2=200000000, E=12
2009-01-29Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-31Sturle SundeNF
no factor from 2^58 to 2^59