A073827 Numbers n such that 1 + 0!*1!*2!*...*n! is prime.

0, 1, 2, 3, 7, 14

Offset: 1

Author

Rick L. Shepherd, Aug 16 2002

Keywords

• nonn

Comments

Any additional terms are greater than 115 with the next prime having 9744 or more digits.

Crossrefs

Cf. A073828 (corresponding primes), A000178 (superfactorials), A019515.

Programs

PARI

pr=1; for(n=0,115, pr=pr*n!; if(isprime(pr+1), print1(n,",")))