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
1861331Factored
FactorDigitsBitsDate
576305304231135.7old
141712732008895211753.72014-10-04 11:10:32
2010360412799678250172167.42020-12-01 07:55:02
117921260306353365773692373.32015-07-15 06:44:45
124304955984326838646332373.42021-08-20 12:35:50
8282031966364983228126380472789.42021-08-20 12:35:50
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 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 Kruse23B18B51DC1EB7663013
Verified (Factored)2017-11-11kkmrkkblmbrbk23B18B51DC1EB7663153858513
Verified (Factored)2020-12-01mrhAE7DEB855E9D96454125361653
Verified2021-08-20SRJ2877AE7DEB855E9D96456106190553
P-1 factors
DateFactorB1B2
2015-07-151179212603063533657736950000015000000
History
DateUserTypeResult
2021-08-21garoCERT
PRP Certification
Proof certified good
2021-08-20SRJ2877C-PRP
M1861331/57630530423/14171273200889521/201036041279967825017/11792126030635336577369/12430495598432683864633/828203196636498322812638047 : AE7DEB855E9D9645
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-20TJAOIF-ECM
Factor: 828203196636498322812638047 / (ECM curve 196, B1=50000, B2=6600000)
2021-08-20TJAOIF-ECM
Factor: 12430495598432683864633 / (ECM curve 15, B1=50000, B2=6600000)
2020-12-01Ben DeloCERT
PRP Certification
Proof certified good
2020-12-01mrhC-PRP
M1861331/57630530423/14171273200889521/11792126030635336577369/201036041279967825017 : AE7DEB855E9D9645
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2020-12-01nordiF-ECM
Factor: 201036041279967825017 / (ECM curve 5, B1=50000, B2=5000000, Sigma=5236069211730655)
2017-11-11kkmrkkblmbrbkC-PRP
M1861331/57630530423/14171273200889521/11792126030635336577369 : 23B18B51DC1EB766
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1861331/57630530423/14171273200889521/11792126030635336577369 : 23B18B51DC1EB766
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1861331/57630530423/14171273200889521/11792126030635336577369 : 23B18B51DC1EB766
PRP without proof (not generated)
2015-07-15alpertronF-PM1
Factor: 11792126030635336577369 / (P-1, B1=500000, B2=15000000, E=12)
2014-10-04TJAOIF
Factor: 14171273200889521 / TF: 53-54