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A036935
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Smallest n-digit prime containing only digits 1 and 8, or 0 if no such prime exists.
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1
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0, 11, 181, 1181, 18181, 0, 1111181, 11818181, 111111181, 1111111181, 11111188811, 0, 1111111118111, 11111111818181, 111111111111881, 1111111111111181, 11111111111188111, 0, 1111111111111111111
(list;
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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a(6k) = 0 as any 6k-digit number containing only digits 1 or 8 is divisible by 7. - Jinyuan Wang, Mar 09 2020
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LINKS
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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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STATUS
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approved
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