Factorial prime

A faculty prime is a prime number that is one greater or less than a school; formally so a prime of the form

The first faculty primes

N! - 1 is prime for

( Sequence A002982 in OEIS ). There are no other known prime numbers in this form.

N! 1 is prime for

( Sequence A002981 in OEIS ). In this way no other primes are also known.

Swell

• Eric W. Weisstein: Factorial Prime. In: MathWorld (English).

• Prime