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A059747
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Numbers k such that 3*2^k - 7 is prime.
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0
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2, 3, 4, 5, 8, 12, 15, 17, 20, 21, 45, 48, 87, 97, 113, 120, 172, 217, 228, 276, 312, 580, 692, 1132, 1588, 1668, 2576, 2591, 3780, 4311, 4412, 6205, 11952, 19897, 19941, 20525, 22821, 44757, 62833
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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Do[ If[ PrimeQ[ 3*2^n - 7 ], Print[n] ], {n, 3000} ]
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PROG
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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