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
19000027Factored
FactorDigitsBitsDate
674808533051253464353192375.82021-04-28 21:04:47
ECM
DigitsB1Curves
255000019 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Martin Fahlgren73821496FE34D23A8583952
Verified (Factored)2007-04-07Marmaridis Ioannis73821496FE34D23A8221692
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2020-08-31Kriesel99E6D235ED134543013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-06-04Dobri99E6D235ED1345431953593953
History
DateUserTypeResult
2023-06-05DobriNF
no factor from 2^71 to 2^72
2023-06-05DobriNF
no factor from 2^70 to 2^71
2023-06-04LOBESCERT
PRP Certification
Proof certified good
2023-06-04DobriC-PRP
M19000027/67480853305125346435319 : 99E6D235ED134543
PRP proof power = 8
PRP: Verified
Proof certified good
2023-06-04DobriNF-PM1
B1=3000000, B2=3002242320
2021-04-28LaurVF-PP1
Start=6/5, B1=1000000, B2=57000000, Factor: 67480853305125346435319
2020-08-31Ben DeloCERT
PRP Certification
CERT proof power =
Proof certified good
2020-08-31KrieselC-PRP
99E6D235ED134543
PRP: Verified (Factored)
Proof certified good
2020-04-09timbitNF-PM1
B1=430000, B2=17415000, E=12
2019-07-22James HeinrichNF-PM1
B1=380000, B2=7980000, E=12
2014-03-31ramgeisNF
no factor from 2^69 to 2^70
2014-03-31ramgeisNF
no factor from 2^68 to 2^69
2012-11-09GrunwalderGIMPNF
no factor from 2^67 to 2^68
2012-11-08GrunwalderGIMPNF
no factor from 2^66 to 2^67