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A171629 Numbers n such that 10^n*(5+3*10^n)+3 is prime. 0
0, 1, 5, 9, 11, 15, 6413, 6741 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Values corresponding to n=6413 and n=6741 were both certified Fermat and Lucas PRPs with WinPFGW and submitted to Lifchitz's Top PRPs database.

LINKS

Table of n, a(n) for n=1..8.

PROG

(PARI) is(n)=ispseudoprime(10^n*(5+3*10^n)+3) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A122062 A314593 A137011 * A102178 A337657 A314594

Adjacent sequences:  A171626 A171627 A171628 * A171630 A171631 A171632

KEYWORD

more,nonn

AUTHOR

Jason Earls, Dec 13 2009

STATUS

approved

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Last modified October 31 19:00 EDT 2020. Contains 338111 sequences. (Running on oeis4.)