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

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MnStatusDetails
1088977Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
64358540711032.6old
8648187144914273473231835032789.52020-06-15 09:57:48
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)2025-09-01Kriesel5B4F9AC99871204C013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-29Oliver KruseFCAC5B71F9FFF2641013
Verified (Factored)2017-10-16Oliver KruseFCAC5B71F9FFF26413327813
Verified (Factored)2018-01-03ATHFCAC5B71F9FFF264111550613
Verified2020-06-16M Miller5B4F9AC99871204C228255253
Verified2020-06-17Luigi Morelli5B4F9AC99871204C289140553
History
DateUserTypeResult
2025-09-01Yu ZhuCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
5B4F9AC99871204C
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-10-05timc995NF-PM1
B1=2000000, B2=63130867800
2020-06-17Luigi MorelliC-PRP
M1088977/6435854071/864818714491427347323183503 : 5B4F9AC99871204C
PRP: Verified
PRP without proof (not generated)
2020-06-16M MillerC-PRP
M1088977/6435854071/864818714491427347323183503 : 5B4F9AC99871204C
PRP: Verified
PRP without proof (not generated)
2020-06-15TJAOIF-ECM
Factor: 864818714491427347323183503 / (ECM curve 12, B1=250000, B2=25000000)
2018-01-03ATHC-PRP
M1088977/6435854071 : FCAC5B71F9FFF264
PRP: Verified
PRP without proof (not generated)
2017-10-16Oliver KruseC-PRP
M1088977/6435854071 : FCAC5B71F9FFF264
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1088977/6435854071 : FCAC5B71F9FFF264
PRP: Verified
PRP without proof (not generated)