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

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MnStatusDetails
1704929Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
13639433823.7old
122754889926.92008-07-15 07:45:34
1264365150159040009318972476.72015-05-24 02:00:36
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-02Kriesel0EA4582630378CC4013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertron5912BBE9C503A1663013
Verified2017-10-18Oliver Kruse5912BBE9C503A166346853713
P-1 factors
DateFactorB1B2
2015-05-2412643651501590400093189750000015000000
History
DateUserTypeResult
2025-09-03ANONYMOUSCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
0EA4582630378CC4
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2021-07-21Dylan DelgadoNF-PM1
B1=3000000, B2=273000000
2021-04-07Dylan DelgadoNF-PM1
B1=1000000, B2=69000000
2017-10-18Oliver KruseC-PRP
M1704929/13639433/122754889/126436515015904000931897 : 5912BBE9C503A166
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1704929/122754889/126436515015904000931897/13639433 : 5912BBE9C503A166
PRP: Verified
PRP without proof (not generated)
2015-05-24alpertronF-PM1
Factor: 126436515015904000931897 / (P-1, B1=500000, B2=15000000, E=12)
2008-07-15J FeitsmaF
Factor: 122754889