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

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MnStatusDetails
381541Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
2289247721.1old
19191596239031340.82008-07-21 09:18:09
97337691758065896071963.12014-10-24 12:46:28
ECM
DigitsB1Curves
2550000280 / 280
30250000378 / 640
Estimated T-Level: 28.0
TF below 2^88 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-23Oliver Kruse03F7AC1EDE6562073013
Verified2017-10-13Oliver Kruse03F7AC1EDE65620731785013
Verified2017-12-15ATH03F7AC1EDE656207326519013
Verified2020-04-18Oliver Kruse4BE5D803BE386252319971953
Verified2024-10-02kkmrkkblmbrbk4BE5D803BE386252326202353
History
DateUserTypeResult
2024-10-02Luke DurantCERT
PRP Certification
Proof certified good
2024-10-02kkmrkkblmbrbkC-PRP
M381541/2289247/1919159623903/9733769175806589607 : 4BE5D803BE386252
PRP proof power = 5
PRP: Verified
Proof certified good
2024-06-04Kevin_9611NF-PM1
B1=15000000, B2=120091810020
2024-05-27Kevin_9611NF-PM1
B1=10000000, B2=77000029470
2024-02-18Denial140NF-PM1
B1=1000000, B2=4220390790
2022-02-07Lisander ViaeneNF-PM1
B1=50000
2020-04-18Oliver KruseC-PRP
M381541/2289247/1919159623903/9733769175806589607 : 4BE5D803BE386252
PRP: Verified
PRP without proof (small exponent)
2017-12-15ATHC-PRP
M381541/2289247/1919159623903/9733769175806589607 : 03F7AC1EDE656207
PRP: Verified
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M381541/2289247/1919159623903/9733769175806589607 : 03F7AC1EDE656207
PRP: Verified
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M381541/known_factors : 03F7AC1EDE656207
PRP without proof (not generated)
2014-10-24TJAOIF-ECM
Factor: 9733769175806589607
2008-07-21J FeitsmaF
Factor: 1919159623903