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A036936 Smallest n-digit prime containing only digits 1 and 9, or 0 if no such prime exists. 1
0, 11, 191, 1999, 11119, 111119, 1111991, 11111119, 111111199, 1111111919, 11111111911, 111111199919, 1111111119919, 11111111119111, 111111111119119, 1111111111111999, 11111111111111119, 111111111111191111 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
MATHEMATICA
Table[SelectFirst[FromDigits/@Tuples[{1, 9}, n], PrimeQ], {n, 20}]/. Missing["NotFound"]->0 (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 26 2020 *)
CROSSREFS
Sequence in context: A001408 A298643 A185123 * A002195 A280070 A171553
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Jan 04 1999
STATUS
approved

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Last modified March 29 08:51 EDT 2024. Contains 371268 sequences. (Running on oeis4.)