1,3

No more terms up to k=7600. The value corresponding to 4083 was certified prime with WinPFGW.

a(18) > 30000. - Michael S. Branicky, May 15 2025

Chris K. Caldwell, Prime Pages, Database Search Output

(PARI) is(n)=ispseudoprime(1+5*10^n+100^n) \\ Charles R Greathouse IV, Jun 13 2017

Cf. A171376, A171459, A171514, A171554.

Sequence in context: A344997 A277289 A218347 * A291607 A092752 A152603

Adjacent sequences: A171408 A171409 A171410 * A171412 A171413 A171414

nonn,more

Jason Earls, Dec 08 2009

approved