Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
1012549Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
578308754683511445.7old
1116205997022979068732166.62016-12-23 10:37:41
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 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)2025-09-01Kriesel0E9B3A5A31A42A2E013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver Kruse3BE18786B2F9F85F2013
Verified2017-10-16kkmrkkblmbrbk3BE18786B2F9F85F220205413
History
DateUserTypeResult
2025-09-01twmossCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
0E9B3A5A31A42A2E
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2021-06-25ViliamFNF-PM1
B1=10000000, B2=1000000000
2017-10-16kkmrkkblmbrbkC-PRP
M1012549/57830875468351/111620599702297906873 : 3BE18786B2F9F85F
PRP: Verified
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M1012549/57830875468351/111620599702297906873 : 3BE18786B2F9F85F
PRP: Verified
PRP without proof (not generated)
2016-12-23TJAOIF-ECM
Factor: 111620599702297906873 / (ECM curve 4, B1=50000, B2=5000000)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12