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A083978
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Smallest palindromic prime containing exactly n 7's.
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11
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7, 727, 72727, 77377, 1777771, 7772777, 17772727771, 777767777, 72777777727, 77777677777, 7767777777677, 7777774777777, 377777777777773, 777777727777777, 72777777777777727, 77777777677777777, 7776777777777776777, 717777777787777777717, 737777777777777777737
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Table[d = 7; i = 1;
While[ x = IntegerDigits[Prime[i]];
x != Reverse[x] || Count[x, d] != n , i++];
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 21 2003
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EXTENSIONS
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STATUS
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approved
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