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A036948 Smallest n-digit prime containing only the digits 6 and 7, or 0 if no such prime exists. 1
7, 67, 677, 0, 67777, 666667, 6676667, 66666667, 666666667, 6666666767, 66666666667, 666666676667, 6666666667777, 66666667677767, 666666666667777, 6666666666767777, 66666666666667667, 666666666666676667 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Table[SelectFirst[10#+7&/@FromDigits/@Tuples[{6, 7}, n], PrimeQ], {n, 0, 17}]/. (Missing["NotFound"]->0) (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 08 2019 *)
CROSSREFS
Sequence in context: A124291 A067275 A073552 * A020469 A340973 A199756
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Jan 04 1999
STATUS
approved

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Last modified June 30 00:34 EDT 2024. Contains 373859 sequences. (Running on oeis4.)