number
Woodall number
An integer of the form n·2ⁿ − 1 for a positive n. Not a Cullen number as n·2ⁿ + 1 alone, and not a Mersenne prime as 2ⁿ − 1 alone.
number
An integer of the form n·2ⁿ − 1 for a positive n. Not a Cullen number as n·2ⁿ + 1 alone, and not a Mersenne prime as 2ⁿ − 1 alone.