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A062639 Numbers k such that 73^k - 72^k is prime. 0
19, 83, 1091, 20117 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Terms greater than 1000 are often only strong pseudoprimes.
a(5) > 10^5. - Robert Price, Apr 21 2014
LINKS
PROG
(PARI) is(n)=ispseudoprime(73^n-72^n) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A352614 A142934 A036564 * A209369 A288749 A358932
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(4) from Robert Price, Apr 21 2014 (Computer run by Adam Marciniec)
STATUS
approved

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Last modified March 28 08:19 EDT 2024. Contains 371236 sequences. (Running on oeis4.)