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

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MnStatusDetails
239963Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
217406479927.7old
84946902011033.02008-07-21 09:14:40
2636886217371237.92008-07-21 09:14:40
ECM
DigitsB1Curves
2550000280 / 280
30250000639 / 640
Estimated T-Level: 30.0
TF below 2^95 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse041CE41164823CBD3013
Verified2017-10-12kkmrkkblmbrbk041CE41164823CBD33828613
Verified2020-04-17Oliver KruseC9669DDA2893851134560153
Verified2024-02-03Wentao HuangC9669DDA289385113897253
History
DateUserTypeResult
2024-02-03James HeinrichCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M239963/217406479/263688621737/8494690201 : C9669DDA28938511
PRP proof power = 5
PRP: Verified
Proof certified good
2022-04-05Oliver KruseNF-PM1
B1=30000000, B2=10120247026890
2021-07-19Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2020-04-17Oliver KruseC-PRP
M239963/217406479/8494690201/263688621737 : C9669DDA28938511
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M239963/217406479/263688621737/8494690201 : 041CE41164823CBD
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M239963/217406479/263688621737/8494690201 : 041CE41164823CBD
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M239963/217406479/263688621737/8494690201 : 041CE41164823CBD
PRP without proof (not generated)
2008-07-21J FeitsmaF
Factor: 8494690201
2008-07-21J FeitsmaF
Factor: 263688621737