A171686 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A171686

Numbers k such that (10^k)^4 + (10^k+1)^4 is prime.

0

0, 3, 10, 22, 59, 84, 5604

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

No more terms up to k = 4200.

LINKS

Table of n, a(n) for n=1..7.

Prime Curio, 200..400..600..400..1

PROG

(PARI) is(n)=ispseudoprime((10^n)^4+(10^n+1)^4) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A222629 A070880 A321335 * A027164 A292921 A270470

Adjacent sequences: A171683 A171684 A171685 * A171687 A171688 A171689

KEYWORD

more,nonn

AUTHOR

Jason Earls, Dec 15 2009

EXTENSIONS

a(7) from Michael S. Branicky, Mar 21 2024

STATUS

approved