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A062638 Numbers k such that 72^k - 71^k is prime. 0
61, 9883, 64693 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Integers corresponding to n greater than 1000 are often only strong pseudoprimes.

a(4) > 10^5. - Robert Price, Mar 20 2014

LINKS

Table of n, a(n) for n=1..3.

PROG

(PARI) is(n)=ispseudoprime(72^n-71^n) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

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

Sequence in context: A103915 A090823 A093261 * A261238 A197105 A195216

Adjacent sequences:  A062635 A062636 A062637 * A062639 A062640 A062641

KEYWORD

nonn,hard,bref

AUTHOR

Mike Oakes, May 18 2001, May 19 2001

EXTENSIONS

a(3) from Robert Price, Mar 20 2014 (computer run by Adam Marciniec)

STATUS

approved

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Last modified September 25 07:19 EDT 2022. Contains 356959 sequences. (Running on oeis4.)