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A062595
Numbers k such that 29^k - 28^k is prime.
0
3, 7219, 34871
OFFSET
1,1
COMMENTS
Terms > 1000 are often only strong pseudoprimes.
a(4) > 10^5. - Robert Price, Sep 22 2012
PROG
(PARI) is(n)=ispseudoprime(29^n-28^n) \\ Charles R Greathouse IV, Jun 13 2017
KEYWORD
nonn,hard,bref
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(3) from Robert Price, Sep 22 2012
STATUS
approved