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

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MnStatusDetails
18133Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
8761448347217671607637078026633099.52008-04-24 15:34:31
24374505293121725877090253687007828860139127.52023-05-20 03:38:57
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000001811 / 4588
Estimated T-Level: 37.0
TF below 2^118 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Unknown7FCC0
Verified (Factored)George WoltmanDCF1E3E341667FCC0
Verified (Factored)Brian J. BeesleyDCF1E3E341667FCC0
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-21Oliver Kruse5B01104C412EE5F81013
Verified (Factored)2017-10-12kkmrkkblmbrbk5B01104C412EE5F81852913
Verified (Factored)2020-04-17Oliver Kruse9ABB37B89645A87B1671853
Verified2023-05-20JacobZ9ABB37B89645A87B21656253
P-1 factors
DateFactorB1B2
2023-05-20243745052931217258770902536870078288601580000000016258362259549410
History
DateUserTypeResult
2025-01-08masserNF-PP1
Start=6/5, B1=132000000, B2=131868000000
2025-01-05masserNF-PP1
Start=101/23, B1=132000000, B2=131868000000
2024-12-24masserNF-PP1
Start=2/7, B1=132000000, B2=131868000000
2023-05-20JacobZC-PRP
M18133/876144834721767160763707802663/243745052931217258770902536870078288601 : 9ABB37B89645A87B
PRP: Verified
PRP without proof (small exponent)
2023-05-20JacobZF-PM1
Factor: 243745052931217258770902536870078288601 / (P-1, B1=5800000000, B2=16258362259549410)
2020-04-17Oliver KruseC-PRP
M18133/876144834721767160763707802663 : 9ABB37B89645A87B
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M18133/876144834721767160763707802663 : 5B01104C412EE5F8
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M18133/876144834721767160763707802663 : 5B01104C412EE5F8
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M18133/876144834721767160763707802663 : 5B01104C412EE5F8
PRP: Verified
PRP without proof (not generated)