A171459 Numbers k such that 1 + 6*10^k + 100^k is prime.

2, 4, 24, 32, 34, 72, 75, 164, 532, 1335, 4704, 29762

Offset: 1

Author

Jason Earls, Dec 09 2009

Keywords

• more
• nonn

Comments

No more terms up to k=7800. The value corresponding to 4704 was certified prime with WinPFGW.

Links

• Chris K. Caldwell, Prime Pages, Database Search Output

Crossrefs

Cf. A171376, A171411, A171514, A171554.

Programs

PARI

is(n)=ispseudoprime(1+6*10^n+100^n) \\ Charles R Greathouse IV, Jun 13 2017

Extensions

a(12) using Caldwell link from Michael S. Branicky, Jun 30 2024