A076193 Numbers k such that k!! + 2^6 is prime.

3, 5, 9, 11, 17, 19, 23, 51, 219, 421, 2845, 4691, 10617

Offset: 1

Author

Zak Seidov, Nov 02 2002

Keywords

• nonn
• more

Comments

a(14) > 50000. - Robert Price, Mar 22 2015

Links

• The OpenPFGW Project, Primality Tester

Crossrefs

Cf. A006882, A080778 and A076185, A076186, A076188, A076189, A076190, A076194, A076195, A076196, A076197 (other values of s in n!! + 2^s).

Programs

Mathematica

Select[Range[0, 1000], PrimeQ[#!! + 64] &] (* Robert Price, Mar 22 2015 *)

Extensions

Edited and extended (n < 4096) by Hugo Pfoertner, Jun 19 2003

a(12)-a(13) from Robert Price, Jan 23 2013