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
1851749Factored
FactorDigitsBitsDate
14813993823.8old
766624087929.52008-07-15 07:47:24
814769561929.62008-07-15 07:47:24
3041242305353878331858.12015-07-05 16:35:58
32708241196994848394872271.52021-05-25 01:51:24
ECM
DigitsB1Curves
2550000280 / 280
30250000104 / 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)2017-09-30alpertron0904F58026E364E34013
Verified (Factored)2017-10-20Oliver Kruse0904F58026E364E3470170613
Verified2021-05-25mikr74D4A5FCDF40B20E5181348653
Verified2021-05-26kutens74D4A5FCDF40B20E5143049853
P-1 factors
DateFactorB1B2
2015-07-0530412423053538783350000015000000
History
DateUserTypeResult
2021-12-26mikrNF-PM1
B1=30000000, B2=195066367860
2021-05-27Cesar CastilloCERT
PRP Certification
Proof certified good
2021-05-26kutensC-PRP
M1851749/14813993/766624087/814769561/304124230535387833/3270824119699484839487 : 74D4A5FCDF40B20E
PRP proof power = 7
PRP: Verified
Proof certified good
2021-05-25mikrNF-PP1
Start=195/43, B1=5000000, B2=425000000
2021-05-25GIMPS-PRIMCERT
PRP Certification
Proof certified good
2021-05-25mikrC-PRP
M1851749/14813993/766624087/814769561/304124230535387833/3270824119699484839487 : 74D4A5FCDF40B20E
PRP proof power = 7
PRP: Verified
Proof certified good
2021-05-25Chang Chia-TcheF-ECM
Factor: 3270824119699484839487 / (ECM curve 3, B1=50000, B2=5000000, Sigma=7947068952706309)
2017-10-20Oliver KruseC-PRP
M1851749/14813993/766624087/814769561/304124230535387833 : 0904F58026E364E3
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1851749/14813993/304124230535387833/766624087/814769561 : 0904F58026E364E3
PRP: Verified (Factored)
PRP without proof (not generated)
2015-07-05alpertronF-PM1
Factor: 304124230535387833 / (P-1, B1=500000, B2=15000000, E=12)
2008-07-15J FeitsmaF
Factor: 814769561
2008-07-15J FeitsmaF
Factor: 766624087