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

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Exponent Range:










MnStatusDetails
552091Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
71771831826.1old
330956470871134.92008-07-21 09:21:33
11060137098528891650.02014-05-16 11:38:13
766981471316816640057185287672996.02014-11-06 11:22:28
ECM
DigitsB1Curves
2550000280 / 280
30250000200 / 640
Estimated T-Level: 26.6
TF below 2^83 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver KruseE2EC25BB6C4FE0434013
Verified2017-10-13kkmrkkblmbrbkE2EC25BB6C4FE043428913013
Verified2020-04-19Oliver KruseF36D3E58A254F47A441764153
Verified2024-12-28kkmrkkblmbrbkF36D3E58A254F47A450282553
P-1 factors
DateFactorB1B2
2014-11-0676698147131681664005718528767150000050000000
History
DateUserTypeResult
2024-12-28XyzzyCERT
PRP Certification
Proof certified good
2024-12-28kkmrkkblmbrbkC-PRP
M552091/71771831/33095647087/1106013709852889/76698147131681664005718528767 : F36D3E58A254F47A
PRP proof power = 6
PRP: Verified
Proof certified good
2021-08-19ViliamFNF-PM1
B1=15000000, B2=1815000000
2020-04-19Oliver KruseC-PRP
M552091/71771831/33095647087/1106013709852889/76698147131681664005718528767 : F36D3E58A254F47A
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M552091/71771831/33095647087/1106013709852889/76698147131681664005718528767 : E2EC25BB6C4FE043
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M552091/71771831/33095647087/1106013709852889/76698147131681664005718528767 : E2EC25BB6C4FE043
PRP: Verified
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M552091/71771831/33095647087/1106013709852889/76698147131681664005718528767 : E2EC25BB6C4FE043
PRP without proof (not generated)
2014-11-06alpertronF-PM1
Factor: 76698147131681664005718528767 / (P-1, B1=1500000, B2=50000000, E=12)
2014-05-16TJAOIF
Factor: 1106013709852889
2008-07-21J FeitsmaF
Factor: 33095647087