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

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MnStatusDetails
1580849Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
60072263825.8old
12474842421930411650.12014-05-21 11:25:04
351055986070752471755.02014-12-27 12:19:13
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 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)2025-09-02KrieselE371A0A6D62B8447013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-05Oliver Kruse433C29F564F6BD8E3013
Verified2017-11-10kkmrkkblmbrbk433C29F564F6BD8E3150798213
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
E371A0A6D62B8447
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-11-10kkmrkkblmbrbkC-PRP
M1580849/60072263/1247484242193041/35105598607075247 : 433C29F564F6BD8E
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1580849/60072263/1247484242193041/35105598607075247 : 433C29F564F6BD8E
PRP: Verified
PRP without proof (not generated)
2017-10-02Oliver KruseC-PRP
M1580849/60072263/1247484242193041/35105598607075247 : 433C29F564F6BD8E
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2014-12-27TJAOIF
Factor: 35105598607075247 / TF: 54-55
2014-05-21TJAOIF
Factor: 1247484242193041