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
266953Factored
FactorDigitsBitsDate
115323697926.8old
41447122791031.92008-07-21 09:15:23
2085629042171237.62008-07-21 09:15:23
838710529576851531756.22014-09-05 15:16:34
5510369112751724914251801992843332105.42022-04-29 17:11:03
ECM
DigitsB1Curves
2550000280 / 280
30250000458 / 640
Estimated T-Level: 28.6 ⓘ
TF below 2^90 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-22Oliver Kruse33006B453785B3B44013
Verified (Factored)2017-10-12Oliver Kruse33006B453785B3B4419806113
Verified (Factored)2017-11-06kkmrkkblmbrbk33006B453785B3B4417122513
Verified (Factored)2020-04-17Oliver Kruse944E23F9262C410249088553
Verified2022-04-29aperson1944E23F9262C410255768853
History
DateUserTypeResult
2022-04-29Jason VK4FJGSCERT
PRP Certification
Proof certified good
2022-04-29aperson1C-PRP
M266953/115323697/4144712279/208562904217/83871052957685153/55103691127517249142518019928433 : 944E23F9262C4102
PRP proof power = 5
PRP: Verified
Proof certified good
2022-04-29_p95holder_F-ECM
Factor: 55103691127517249142518019928433 / (ECM curve 6, B1=250000, B2=25000000)
2021-06-30George WoltmanNF-PP1
Start=2/7, B1=10000000, B2=830000000
2021-06-30George WoltmanNF-PM1
B1=20000000, B2=1820000000
2020-04-17Oliver KruseC-PRP
M266953/115323697/4144712279/208562904217/83871052957685153 : 944E23F9262C4102
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M266953/115323697/4144712279/208562904217/83871052957685153 : 33006B453785B3B4
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M266953/115323697/208562904217/4144712279/83871052957685153 : 33006B453785B3B4
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M266953/known_factors : 33006B453785B3B4
PRP without proof (not generated)
2014-09-05TJAOIF-ECM
Factor: 83871052957685153
2008-07-21J FeitsmaF
Factor: 4144712279
2008-07-21J FeitsmaF
Factor: 208562904217