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Prime factors of Giuga numbers A007850 with 8 or fewer prime divisors.
3

%I #11 Jan 26 2014 12:24:20

%S 2,3,5,7,11,13,17,23,31,41,43,59,71,103,163,1381,1831,3041,4447,47057,

%T 47059,47137,61559,67213,138683,713863,775807,2861051,28282147,

%U 29133437,2259696349,3892535183,110725121051,1456230512169437

%N Prime factors of Giuga numbers A007850 with 8 or fewer prime divisors.

%C See A007850 for comments, references, and links.

%e 30 = 2*3*5 is a Giuga number, so 2, 3, 5 are members.

%Y Cf. A007850, A216824, A236434.

%K nonn,fini,full

%O 1,1

%A _Jonathan Sondow_, Sep 17 2012