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

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MnStatusDetails
172849Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
11653164874441215589900843832100733106.52010-02-15 15:13:11
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000211 / 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)Amdahl 6 - 198926F5C9A60
Verified (Factored)Sergio Filippini9165FD2D26F5C9A60
Verified (Factored)Brian J. Beesley9165FD2D26F5C9A60
Verified (Factored)Eivind Triel9165FD2D26F5C9A619709
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse580E464368089CC91013
Verified2017-10-12kkmrkkblmbrbk580E464368089CC9110042313
Verified2020-04-17Oliver KruseD5E9350C206219F918942353
Verified2024-02-03Wentao HuangD5E9350C206219F914441953
History
DateUserTypeResult
2025-09-15masserNF-PM1
B1=230000000, B2=24136924541730
2024-02-03Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M172849/116531648744412155899008438321007 : D5E9350C206219F9
PRP proof power = 5
PRP: Verified
Proof certified good
2022-03-07LordJuliusNF
no factor from 2^57 to 2^58
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-17Oliver KruseC-PRP
M172849/116531648744412155899008438321007 : D5E9350C206219F9
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M172849/116531648744412155899008438321007 : 580E464368089CC9
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M172849/116531648744412155899008438321007 : 580E464368089CC9
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M172849/116531648744412155899008438321007 : 580E464368089CC9
PRP without proof (not generated)
2017-05-07kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2010-02-15-Anonymous-F-ECM
Factor: 116531648744412155899008438321007
2009-01-22Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-21axnNF-PM1
B1=5000000, B2=200000000, E=12
2008-12-30Sturle SundeNF
no factor from 2^58 to 2^59