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A105433 Smallest prime dividing the composite number consisting of n 1's followed by a terminal 3, where n=A105432. 1
3, 23, 3, 13, 3, 461, 3, 13, 1163, 3, 19, 1077697, 3, 13, 29, 3, 31, 3, 13, 1297561, 3, 81703, 53, 3, 13, 1867, 3, 19, 6053, 3, 13, 163, 3, 1733, 1954503644062423429, 3, 13, 33142829, 3, 79, 24733371888243845161, 3, 13, 193367, 3, 19, 501654709, 3, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

Makoto Kamada, Factorizations of 11...113.

MATHEMATICA

FactorInteger[#][[1, 1]]&/@Select[Table[FromDigits[PadLeft[{3}, n, 1]], {n, 60}], !PrimeQ[#]&] (* Harvey P. Dale, Jun 04 2012 *)

CROSSREFS

Sequence in context: A232016 A132558 A072113 * A196086 A196083 A285098

Adjacent sequences:  A105430 A105431 A105432 * A105434 A105435 A105436

KEYWORD

nonn

AUTHOR

Lekraj Beedassy, Apr 08 2005

STATUS

approved

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Last modified August 4 19:37 EDT 2020. Contains 336202 sequences. (Running on oeis4.)