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
2819471Factored
FactorDigitsBitsDate
24405937864777430411961.1old
415665274971630966072065.22018-07-10 10:25:38
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David TilleyCEE23261FED3E3DB0
Verified (Factored)1999-07-12Joe RabinoffCEE23261FED3E3DB2330499
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-22Oliver Kruse81997C11512803011227044753
Verified (Factored)2017-12-07Chang Chia-Tche81997C11512803011192968953
Verified2018-07-12_p95holder_81997C11512803012272773053
History
DateUserTypeResult
2021-09-18Dylan DelgadoNF-PM1
B1=1000000, B2=71000000
2018-07-12_p95holder_C-PRP
M2819471/2440593786477743041/41566527497163096607 : 81997C1151280301
PRP: Verified
PRP without proof (not generated)
2018-07-10TJAOIF
Factor: 41566527497163096607 / TF: 65-66
2017-12-07Chang Chia-TcheC-PRP
M2819471/2440593786477743041 : 81997C1151280301
PRP: Verified
PRP without proof (not generated)
2017-10-22Oliver KruseC-PRP
M2819471/2440593786477743041 : 81997C1151280301
PRP: Verified
PRP without proof (not generated)