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

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MnStatusDetails
1984859Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
35727463825.1old
24175582631031.22008-07-15 07:48:59
34785104412421133548092271.62024-06-03 09:35:53
233920451964924054984562072684.32024-06-03 09:35:53
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)2025-09-02KrieselFF5E0E488284155A013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-05Oliver Kruse1F0DBD2F28B615C92013
Verified (Factored)2017-11-12kkmrkkblmbrbk1F0DBD2F28B615C9274131413
Verified2024-06-03Naegi MakotoFF5E0E488284155A4195848453
History
DateUserTypeResult
2025-09-03JurzalCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
FF5E0E488284155A
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2025-08-01USAFSSNF-PM1
B1=1680000, B2=8377365150
2024-06-03freemaniacCERT
PRP Certification
Proof certified good
2024-06-03Naegi MakotoC-PRP
M1984859/35727463/2417558263/3478510441242113354809/23392045196492405498456207 : FF5E0E488284155A
PRP proof power = 7
PRP: Verified
Proof certified good
2024-06-03TJAOIF-ECM
Factor: 23392045196492405498456207 / (ECM curve 2, B1=250000, B2=40000000, Sigma=396726505408741)
2024-06-03TJAOIF-ECM
Factor: 3478510441242113354809 / (ECM curve 13, B1=250000, B2=40000000, Sigma=7449814809885585)
2022-08-14USAFSSNF-PM1
B1=132000, B2=134381520
2017-11-12kkmrkkblmbrbkC-PRP
M1984859/35727463/2417558263 : 1F0DBD2F28B615C9
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1984859/35727463/2417558263 : 1F0DBD2F28B615C9
PRP: Verified (Factored)
PRP without proof (not generated)
2008-07-15J FeitsmaF
Factor: 2417558263