Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
1697287Factored
FactorDigitsBitsDate
27156593824.7old
6943280206034010941292169.22018-07-24 05:39:45
9641330997012188234332169.72018-03-05 05:34:10
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)2017-09-30alpertron49FBB42A23E2718F1013
Verified (Factored)2017-10-18Oliver Kruse49FBB42A23E2718F190257413
Verified (Factored)2018-03-09trebor55782DB40B211FE5241240753
Verified (Factored)2018-03-10ANONYMOUS55782DB40B211FE52130301853
Verified (Factored)2018-03-11Chang Chia-Tche55782DB40B211FE5222865853
Verified2018-07-24_p95holder_55782DB40B211FE5314074853
History
DateUserTypeResult
2018-07-24_p95holder_C-PRP
M1697287/27156593/694328020603401094129/964133099701218823433 : 55782DB40B211FE5
PRP: Verified
PRP without proof (not generated)
2018-07-24Chang Chia-TcheF-ECM
Factor: 694328020603401094129 / (ECM curve 1, B1=50000, B2=5000000)
2018-03-11Chang Chia-TcheC-PRP
M1697287/27156593/964133099701218823433 : 55782DB40B211FE5
PRP: Verified
PRP without proof (not generated)
2018-03-10ANONYMOUSC-PRP
M1697287/27156593/964133099701218823433 : 55782DB40B211FE5
PRP: Verified
PRP without proof (not generated)
2018-03-09treborC-PRP
M1697287/27156593/964133099701218823433 : 55782DB40B211FE5
PRP: Verified
PRP without proof (not generated)
2018-03-05Oliver KruseF-ECM
Factor: 964133099701218823433 / (ECM curve 1, B1=50000, B2=5000000)
2017-10-18Oliver KruseC-PRP
M1697287/27156593 : 49FBB42A23E2718F
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1697287/27156593 : 49FBB42A23E2718F
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12