Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
101021Factored
FactorDigitsBitsDate
808169619.6old
852415199929.72008-07-26 09:16:55
67899068748700535111962.62008-08-26 20:11:58
712168686736914050442732375.92010-03-28 20:12:18
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000271 / 1566
Estimated T-Level: 30.9 ⓘ
TF below 2^98 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-21Oliver Kruse5FA8976BFB7E3F054013
Verified2017-10-09Chang Chia-Tche5FA8976BFB7E3F054013
Verified2017-10-13kkmrkkblmbrbk5FA8976BFB7E3F0542103713
Verified2020-04-17Oliver Kruse025EC704531304D243946953
Verified2022-04-15LordJulius025EC704531304D24733453
History
DateUserTypeResult
2022-11-07LordJuliusNF
no factor from 2^66 to 2^67
2022-11-07LordJuliusNF
no factor from 2^65 to 2^66
2022-11-07LordJuliusNF
no factor from 2^64 to 2^65
2022-11-07LordJuliusNF
no factor from 2^63 to 2^64
2022-04-15LordJuliusC-PRP
M101021/808169/852415199/6789906874870053511/71216868673691405044273 : 025EC704531304D2
PRP: Verified
PRP without proof (small exponent)
2022-04-13LordJuliusNF
no factor from 2^61 to 2^62
2022-04-13LordJuliusNF
no factor from 2^60 to 2^61
2022-04-13LordJuliusNF
no factor from 2^59 to 2^60
2022-04-13LordJuliusNF
no factor from 2^58 to 2^59
2022-04-13LordJuliusNF
no factor from 2^57 to 2^58
2021-12-19Seth_TrNF-PM1
B1=1000000000, B2=6735532633830
2020-04-17Oliver KruseC-PRP
M101021/808169/852415199/6789906874870053511/71216868673691405044273 : 025EC704531304D2
PRP: Verified
PRP without proof (small exponent)
2018-10-21J.R. AllenNF
no factor from 2^59 to 2^60
2018-10-21J.R. AllenNF
no factor from 2^58 to 2^59
2018-10-21J.R. AllenNF
no factor from 2^57 to 2^58
2018-10-21J.R. AllenNF
no factor from 2^52 to 2^57
2017-10-13kkmrkkblmbrbkC-PRP
M101021/808169/852415199/6789906874870053511/71216868673691405044273 : 5FA8976BFB7E3F05
PRP: Verified
PRP without proof (not generated)
2017-10-09Chang Chia-TcheC-PRP
M101021/known_factors : 5FA8976BFB7E3F05
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M101021/known_factors : 5FA8976BFB7E3F05
PRP without proof (not generated)
2016-11-02kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2010-03-28Rob_DeeF-ECM
Factor: 71216868673691405044273
2008-08-26-Anonymous-F-ECM
Factor: 6789906874870053511
2008-07-26J FeitsmaF
Factor: 852415199