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A032717
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n prefixed by '9' and followed by '3' is a prime.
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1
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5, 8, 10, 13, 17, 20, 28, 29, 32, 34, 40, 41, 43, 46, 47, 53, 61, 62, 64, 73, 74, 80, 83, 88, 92, 97, 103, 115, 116, 118, 119, 124, 125, 128, 130, 137, 139, 142, 143, 145, 146, 149, 151, 157, 158, 167, 170, 173, 175, 181, 182, 187, 194, 200, 203, 208, 214
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OFFSET
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1,1
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LINKS
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EXAMPLE
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953 is prime, so 5 is a term.
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MATHEMATICA
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Select[Range[250], PrimeQ[FromDigits[Join[{9}, IntegerDigits[#], {3}]]]&] (* Harvey P. Dale, Jul 30 2013 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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