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A062613
Numbers k such that 47^k - 46^k is prime.
0
5, 17, 67, 73, 691, 9781, 79201, 89113
OFFSET
1,1
COMMENTS
Terms greater than 1000 are often only strong pseudoprimes.
a(9) > 10^5 - Robert Price, Oct 10 2012
PROG
(PARI) is(n)=ispseudoprime(47^n-46^n) \\ Charles R Greathouse IV, Jun 13 2017
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(7)-a(8) from Robert Price, Oct 10 2012 (computer run by Adam Marciniec)
STATUS
approved