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

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Exponent Range:










MnStatusDetails
1788649Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
53659471825.7old
30442805991031.52008-07-15 07:46:38
65249915531032.62008-07-15 07:46:38
1714365042952040762332167.22020-04-09 20:45:29
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)2025-09-02KrieselB8F606AAEB7493F1013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-03Oliver Kruse66E97E9631C8297C3013
Verified (Factored)2017-11-05kkmrkkblmbrbk66E97E9631C8297C345168613
Verified2020-04-09ATHB8F606AAEB7493F14171740253
Verified2020-04-11oodairaB8F606AAEB7493F1489528353
History
DateUserTypeResult
2025-09-03flavCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
B8F606AAEB7493F1
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2020-04-11oodairaC-PRP
M1788649/53659471/3044280599/6524991553/171436504295204076233 : B8F606AAEB7493F1
PRP: Verified
PRP without proof (not generated)
2020-04-09ATHC-PRP
M1788649/53659471/3044280599/6524991553/171436504295204076233 : B8F606AAEB7493F1
PRP: Verified
PRP without proof (not generated)
2020-04-09Oliver KruseF-ECM
Factor: 171436504295204076233 / (ECM curve 3, B1=50000, B2=5000000, Sigma=348522256788543)
2017-11-05kkmrkkblmbrbkC-PRP
M1788649/53659471/3044280599/6524991553 : 66E97E9631C8297C
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1788649/53659471/3044280599/6524991553 : 66E97E9631C8297C
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 6524991553
2008-07-15J FeitsmaF
Factor: 3044280599