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

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MnStatusDetails
1883023Factored
FactorDigitsBitsDate
1196293326378495437264632476.72015-12-02 21:34:27
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John R Pierce8D21861F7F63B1230
Verified (Factored)1999-01-10BitBucket8D21861F7F63B123106017
Verified (Factored)2015-07-03MadPoo8D21861F7F63B123309918
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertron77AB1164800092071013
Verified2017-10-19Oliver Kruse77AB116480009207163848113
History
DateUserTypeResult
2017-10-19Oliver KruseC-PRP
M1883023/119629332637849543726463 : 77AB116480009207
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1883023/119629332637849543726463 : 77AB116480009207
PRP: Verified
PRP without proof (not generated)
2015-12-02Chang Chia-TcheF-ECM
Factor: 119629332637849543726463 / (ECM curve 1, B1=50000, B2=5000000)
2015-10-07Bruno VictalNF-PM1
B1=500000, B2=15000000, E=12
2015-09-12ramgeisNF
no factor from 2^65 to 2^66
2015-07-03MadPooC-LL
8D21861F7F63B123
2015-05-09snme2pm1NF
no factor from 2^64 to 2^65
2015-05-09snme2pm1NF
no factor from 2^63 to 2^64
2012-01-15markrNF-PM1
B1=275000, B2=6000000, E=12
2011-03-08GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-01Architects CubedNF
no factor from 2^60 to 2^61