A247871 - OEIS

%I #9 Jun 19 2022 13:56:05

%S 5,5,11,7,5,7,5,17,11,13,5,7,5,7,5,13,17,5,11,5,7,5,29,7,5,23,19,5,7,

%T 13,5,11,7,5,17,5,13,11,19,5,23,7,31,5,11,7,5,5,7,19,11,5,41,13,7,23,

%U 5,17,5,29,37,5,19,7,5,11,17,7,5,23,13,5,7,11,5,7,5,13,41,11,43,5,31,37,5,7,11,5,17,7,5,5,7,13,29,5

%N Least prime factor of A247679

%H Odimar Fabeny, <a href="/A247871/b247871.txt">Table of n, a(n) for n = 1..10000</a>

%t FactorInteger[#][[1,1]]&/@Select[Range[17,4000,18],CompositeQ] (* _Harvey P. Dale_, Jun 19 2022 *)

%Y Cf. A056608, A247679.

%K nonn,easy

%O 1,1

%A _Odimar Fabeny_, Sep 25 2014