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A093765
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Numbers n such that 6^n+5^(n-1) is prime.
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16
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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
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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15 is a member since 615+515 = 476288500201 which is a prime number.
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MATHEMATICA
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Do[ If[ PrimeQ[6^n + 5^(n - 1)], Print[n]], {n, 4000]
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PROG
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Herman H. Rosenfeld (herm3(AT)pacbell.net), May 17 2004
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EXTENSIONS
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STATUS
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approved
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