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
992863Factored
FactorDigitsBitsDate
697564884947390493912065.92007-09-16 08:50:52
1560005669779404797992167.12016-10-14 12:25:10
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 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
Verified2017-10-05Oliver KruseB3A5B34109B837522013
Verified2017-10-15Oliver KruseB3A5B34109B83752221864013
Verified2017-12-24ATHB3A5B34109B83752248255813
Unverified (Reliable)2020-04-25Oliver Kruse43B873CB6A1B8F__271292553
History
DateUserTypeResult
2020-04-25Oliver KruseC-PRP
M992863/69756488494739049391/156000566977940479799 : 43B873CB6A1B8F__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-12-24ATHC-PRP
M992863/69756488494739049391/156000566977940479799 : B3A5B34109B83752
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-15Oliver KruseC-PRP
M992863/69756488494739049391/156000566977940479799 : B3A5B34109B83752
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-05Oliver KruseC-PRP
M992863/69756488494739049391/156000566977940479799 : B3A5B34109B83752
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M992863/69756488494739049391/156000566977940479799 : B3A5B34109B83752
PRP without proof (not generated)
2016-10-14TJAOIF-ECM
Factor: 156000566977940479799 / (ECM curve 2, B1=50000, B2=5000000)
2007-09-16Chad DavisF-ECM
Factor: 69756488494739049391