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A052078
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Smallest prime formed by concatenating n consecutive decreasing numbers, 0 if no such prime exists.
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3
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2, 43, 0, 10987, 76543, 0, 73727170696867, 4645444342414039, 0, 56555453525150494847, 219218217216215214213212211210209, 0, 25242322212019181716151413, 6059585756555453525150494847, 0
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OFFSET
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1,1
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COMMENTS
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Starting numbers in concatenations are given by A052080.
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LINKS
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MATHEMATICA
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Table[Min[Select[FromDigits[Flatten[IntegerDigits[#]]]&/@ Partition[ Range[ 1000, 1, -1], n, 1], PrimeQ]], {n, 20}]/.\[Infinity]->0 (* Harvey P. Dale, Jun 03 2019 *)
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CROSSREFS
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KEYWORD
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nonn,base,nice
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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