A036951 - OEIS

A036951

Smallest n-digit prime containing only the digits 8 and 9, or 0 if no such prime exists.

0, 89, 0, 8999, 89899, 888989, 8888989, 88888999, 888898889, 8888888989, 88888888999, 888888898999, 8888888999899, 88888888888889, 888888888898999, 8888888888989999, 88888888888888889, 888888888888898889

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OFFSET

1,2

LINKS

Jinyuan Wang, Table of n, a(n) for n = 1..500

MATHEMATICA

Table[SelectFirst[10#+9&/@FromDigits/@Tuples[{8, 9}, n-1], PrimeQ], {n, 20}]/. (Missing["NotFound"]->0) (* Harvey P. Dale, Feb 01 2018 *)

CROSSREFS

Cf. A020472, A036229, A036325.

Sequence in context: A159420 A093222 A114922 * A051328 A166321 A187812

Adjacent sequences: A036948 A036949 A036950 * A036952 A036953 A036954

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Jan 04 1999

STATUS

approved