Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1950419Factored
FactorDigitsBitsDate
3900839721.9old
15603353823.92008-07-15 07:48:35
2055554925562923068472167.52020-11-22 06:42:57
22000930167758779203112270.92021-09-01 13:44:55
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 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
Verified (Factored)2017-10-05Oliver Kruse8A3552F30797369F2013
Verified (Factored)2017-11-11kkmrkkblmbrbk8A3552F30797369F2158738413
Verified (Factored)2020-11-22SRJ2877606AC3C4D21D0B59362985653
Verified2021-09-02Team_Inspector606AC3C4D21D0B594158151853
History
DateUserTypeResult
2021-09-02Simon JosefssonCERT
PRP Certification
Proof certified good
2021-09-02Team_InspectorC-PRP
M1950419/3900839/15603353/205555492556292306847/2200093016775877920311 : 606AC3C4D21D0B59
PRP proof power = 7
PRP: Verified
Proof certified good
2021-09-01Team_InspectorF-ECM
Factor: 2200093016775877920311 / (ECM curve 2, B1=50000, B2=6500000, Sigma=4873068625447823)
2020-11-22ky0urakuCERT
PRP Certification
Proof certified good
2020-11-22SRJ2877C-PRP
M1950419/3900839/15603353/205555492556292306847 : 606AC3C4D21D0B59
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2020-11-22MarkSF-ECM
Factor: 205555492556292306847 / (ECM curve 6, B1=50000, B2=5000000, Sigma=6293033908384361)
2017-11-11kkmrkkblmbrbkC-PRP
M1950419/3900839/15603353 : 8A3552F30797369F
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1950419/3900839/15603353 : 8A3552F30797369F
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 15603353