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
1068481Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
23506583824.5old
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)2025-09-01Kriesel7AFA7277C9D9DB3F013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver Kruse45FCB32EE34BF5EA1013
Verified2017-10-16Oliver Kruse45FCB32EE34BF5EA114443113
Verified2017-12-31ATH45FCB32EE34BF5EA190498113
History
DateUserTypeResult
2025-09-01OnychomysCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
7AFA7277C9D9DB3F
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-08-21cramsey87NF-PM1
B1=7000000, B2=58926602280
2017-12-31ATHC-PRP
M1068481/23506583 : 45FCB32EE34BF5EA
PRP: Verified
PRP without proof (not generated)
2017-10-16Oliver KruseC-PRP
M1068481/23506583 : 45FCB32EE34BF5EA
PRP: Verified
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M1068481/23506583 : 45FCB32EE34BF5EA
PRP: Verified
PRP without proof (not generated)