Definition:Woodall Prime

Definition
A Woodall prime is a Woodall number:
 * $n \times 2^n - 1$

which is also prime.

Also known as
Some sources refer to primes of the form $n \times 2^n - 1$ as Cullen primes, along with those of the form $n \times 2^n + 1$.

However, it is now conventional to reserve the term Cullen primes, named for, to those of the form $n \times 2^n + 1$.

The latter are also known as Cunningham primes, for, so as to ensure their unambiguous distinction from Woodall primes.

Also see

 * Definition:Woodall Number