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
1899917Factored
FactorDigitsBitsDate
15199337823.9old
26598839824.72008-07-15 07:47:59
750999191771136.12008-07-15 07:47:59
3938635396939627042812168.42020-10-16 09:23:21
16526008802418147721672270.52020-10-31 12:48:39
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)2017-10-04Oliver Kruse01852935594A7A783013
Verified (Factored)2017-11-09kkmrkkblmbrbk01852935594A7A78343209113
Verified (Factored)2020-10-16M MillerF29E12F855AD070A427415853
Verified2020-10-31laxeyeF29E12F855AD070A530101853
Verified2020-11-01PoaoF29E12F855AD070A5113746953
History
DateUserTypeResult
2022-04-12Lisander ViaeneNF-PM1
B1=500000, B2=2903586840
2020-11-01daveward2005CERT
PRP Certification
Proof certified good
2020-11-01PoaoC-PRP
M1899917/15199337/26598839/75099919177/393863539693962704281/1652600880241814772167 : F29E12F855AD070A
PRP proof power = 7
PRP: Verified
Proof certified good
2020-10-31curtiscCERT
PRP Certification
Proof certified good
2020-10-31laxeyeC-PRP
M1899917/15199337/26598839/75099919177/393863539693962704281/1652600880241814772167 : F29E12F855AD070A
PRP proof power = 7
PRP: Verified
Proof certified good
2020-10-31nordiF-ECM
Factor: 1652600880241814772167 / (ECM curve 1, B1=50000, B2=5000000, Sigma=312347981627413)
2020-10-16curtiscCERT
PRP Certification
Proof certified good
2020-10-16M MillerC-PRP
M1899917/15199337/26598839/75099919177/393863539693962704281 : F29E12F855AD070A
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2020-10-16nordiF-ECM
Factor: 393863539693962704281 / (ECM curve 2, B1=50000, B2=5000000, Sigma=703486477141089)
2017-11-09kkmrkkblmbrbkC-PRP
M1899917/15199337/26598839/75099919177 : 01852935594A7A78
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1899917/15199337/26598839/75099919177 : 01852935594A7A78
PRP: Verified (Factored)
PRP without proof (not generated)
2008-07-15J FeitsmaF
Factor: 75099919177
2008-07-15J FeitsmaF
Factor: 26598839