

A093765


Numbers n such that 6^n+5^(n1) is prime.


16



1, 2, 3, 8, 9, 15, 26, 30, 69, 212, 318, 909, 1224, 1946, 2192, 2234, 2978, 3344, 4976, 7947, 8079, 23334, 23624, 55401, 89712
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OFFSET

1,2


COMMENTS



LINKS



EXAMPLE

15 is a member since 615+515 = 476288500201 which is a prime number.


MATHEMATICA

Do[ If[ PrimeQ[6^n + 5^(n  1)], Print[n]], {n, 4000]


PROG



CROSSREFS



KEYWORD

nonn


AUTHOR

Herman H. Rosenfeld (herm3(AT)pacbell.net), May 17 2004


EXTENSIONS



STATUS

approved



