%I A051342
%S A051342 3,7,31,211,2311,59,19,347,317,331,200560490131,181,61,167,953,73,277,
%T A051342 223,54730729297,1063,2521,22093,265739,131,2336993,960703,2297,149,
%U A051342 334507,5122427,1543,1951,881,678279959005528882498681487,87549524399
%N A051342 Smallest prime factor of 1 + (product of first n primes).
%C A051342 Based on Euclid's proof that there are infinitely many primes.
%H A051342 Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/
               matha1/matha102.htm">Factorizations of many number sequences</a>
%H A051342 Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/
               matha1/matha103.htm">Factorizations of many number sequences</a>
%H A051342 R. G. Wilson v, <a href="a38507.txt">Explicit factorizations</a>
%Y A051342 a(n) = A020639(1+A002110(n)). Cf. A014545, A002585.
%Y A051342 Sequence in context: A141385 A059296 A123332 this_sequence A002585 A103785 
               A083772
%Y A051342 Adjacent sequences: A051339 A051340 A051341 this_sequence A051343 A051344 
               A051345
%K A051342 nonn
%O A051342 1,1
%A A051342 Labos E. (labos(AT)ana.sote.hu)