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
1710221Factored
FactorDigitsBitsDate
717309979234674180072066.02014-02-18 12:57:25
ECM
DigitsB1Curves
2550000280 / 280
30250000136 / 640
Estimated T-Level: 26.1 ⓘ
TF below 2^82 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ken Berryman5EAB44A3C2E8062E0
Verified (Factored)1999-04-13Eric Leblanc5EAB44A3C2E8062E597648
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertron671CD35C34F573AB1013
Verified2017-10-18Oliver Kruse671CD35C34F573AB1165822413
History
DateUserTypeResult
2017-10-18Oliver KruseC-PRP
M1710221/71730997923467418007 : 671CD35C34F573AB
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1710221/71730997923467418007 : 671CD35C34F573AB
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2014-02-18Never Odd Or EvenF
Factor: 71730997923467418007 / TF: 65-66
2014-01-18Never Odd Or EvenNF
no factor from 2^69 to 2^70
2014-01-18Never Odd Or EvenNF
no factor from 2^68 to 2^69
2014-01-18Never Odd Or EvenNF
no factor from 2^67 to 2^68
2014-01-18Never Odd Or EvenNF
no factor from 2^66 to 2^67
2014-01-18Never Odd Or EvenNF
no factor from 2^65 to 2^66
2013-09-04David CampeauNF
no factor from 2^64 to 2^65
2013-08-13BloodIceNF
no factor from 2^63 to 2^64
2011-02-12Carsten KossendeyNF-PM1
B1=90000, B2=1507500, E=6
2010-10-16GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-21Architects CubedNF
no factor from 2^60 to 2^61