Definition:Cullen Prime

Definition
A Cullen prime is a Cullen number:
 * $n \times 2^n + 1$

which is also prime.

Also defined as
Some sources refer to primes of the form $n \times 2^n - 1$ as also being Cullen primes.

However, it is now conventional to refer to numbers of the form $n \times 2^n - 1$ as Woodall primes, for.

Also known as
Some sources refer to Cullen primes as Cunningham primes, for, so as to ensure their distinction from Woodall primes.

Also see

 * Definition:Cullen Number