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

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MnStatusDetails
872159Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
73033478296491342.7old
21238613906202891650.92014-06-12 11:18:51
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
Verified2017-09-28Oliver KruseC3D4D67C603D84552013
Verified2017-10-14Oliver KruseC3D4D67C603D8455221144413
Verified2017-12-19ATHC3D4D67C603D8455242213113
Verified2020-04-22Oliver Kruse3AC1555833BC3D33261872653
Verified2025-05-07kkmrkkblmbrbk3AC1555833BC3D332779453
History
DateUserTypeResult
2025-05-07Jonathan WebbCERT
PRP Certification
Proof certified good
2025-05-07kkmrkkblmbrbkC-PRP
M872159/7303347829649/2123861390620289 : 3AC1555833BC3D33
PRP proof power = 6
PRP: Verified
Proof certified good
2024-05-03cramsey87NF-PM1
B1=2000000, B2=10230980760
2020-04-22Oliver KruseC-PRP
M872159/7303347829649/2123861390620289 : 3AC1555833BC3D33
PRP: Verified
PRP without proof (small exponent)
2017-12-19ATHC-PRP
M872159/7303347829649/2123861390620289 : C3D4D67C603D8455
PRP: Verified
PRP without proof (small exponent)
2017-10-14Oliver KruseC-PRP
M872159/7303347829649/2123861390620289 : C3D4D67C603D8455
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M872159/7303347829649/2123861390620289 : C3D4D67C603D8455
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12
2014-06-12TJAOIF
Factor: 2123861390620289