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A062598 Numbers k such that 32^k - 31^k is prime. 0
5, 1427, 2357, 24499 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Terms > 1000 often correspond only to strong pseudoprimes.

a(5) > 10^5. - Robert Price, Oct 03 2012

LINKS

Table of n, a(n) for n=1..4.

PROG

(PARI) is(n)=ispseudoprime(32^n-31^n) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A000043, A057468, A059801, A059802, A062572-A062666.

Sequence in context: A096725 A332536 A172920 * A203690 A304425 A316280

Adjacent sequences: A062595 A062596 A062597 * A062599 A062600 A062601

KEYWORD

nonn,hard

AUTHOR

Mike Oakes, May 18 2001, May 19 2001

EXTENSIONS

a(4) from Robert Price, Oct 03 2012

STATUS

approved

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Last modified January 28 17:08 EST 2023. Contains 359895 sequences. (Running on oeis4.)