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

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MnStatusDetails
282847Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
80002565826409569445230012582.72010-02-04 16:44:55
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000214 / 1566
Estimated T-Level: 30.7
TF below 2^97 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski3FCA0
Verified (Factored)Unknown3FCA0
Verified (Factored)Brian J. Beesley19671BF35BCFBFCA0
Verified (Factored)Eivind Triel19671BF35BCFBFCA53764
Verified (Factored)2002-03-03Brian J. Beesley19671BF35BCFBFCA34773
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-24Oliver Kruse8C0E27A4F4510CBB1013
Verified2017-10-12Oliver Kruse8C0E27A4F4510CBB117328113
Verified2017-11-06kkmrkkblmbrbk8C0E27A4F4510CBB15218313
Verified2020-04-17Oliver Kruse9FD2452FF6DDC322127634153
Verified2024-08-10kkmrkkblmbrbk9FD2452FF6DDC32212861453
History
DateUserTypeResult
2024-11-11yuriy_5-1NF-PM1
B1=26021924, B2=6348019808130
2024-08-10yellow_galaxyCERT
PRP Certification
Proof certified good
2024-08-10kkmrkkblmbrbkC-PRP
M282847/8000256582640956944523001 : 9FD2452FF6DDC322
PRP proof power = 5
PRP: Verified
Proof certified good
2023-02-15USAFSSNF-PM1
B1=3500000, B2=18264117300
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-17Oliver KruseC-PRP
M282847/8000256582640956944523001 : 9FD2452FF6DDC322
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M282847/8000256582640956944523001 : 8C0E27A4F4510CBB
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M282847/8000256582640956944523001 : 8C0E27A4F4510CBB
PRP: Verified
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M282847/8000256582640956944523001 : 8C0E27A4F4510CBB
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M282847/8000256582640956944523001 : 8C0E27A4F4510CBB
PRP without proof (not generated)
2010-02-04Sturle SundeF-ECM
Factor: 8000256582640956944523001
2009-01-27Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-01Sturle SundeNF
no factor from 2^58 to 2^59