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%I #7 Sep 19 2013 03:19:59
%S 9186050031556349952001,837294585717161066223413745156096001,
%T 102833200965458113792221682653890347008001,
%U 8564360335859979576063023115658227351552001
%N Primes of the form 1 + 6-multiperfect numbers.
%C Primes of the form 1+A046061(n). A subsequence of A093034. This sequence has only 8 terms. a(5)=1+A046061(76),a(6)=1+A046061(79),
%C a(7)=1+A046061(204) and a(8)=1+A046061(209).
%C If p is a term of this sequence then for each positive integer k, x=p^k is a solution for the equation sigma(phi(x))=6(x-1). See comment lines of the sequence A093034.
%e p=9186050031556349952001 is prime and sigma(p-1)/(p-1)=6, so p is in the sequence.
%Y Cf. A046061, A093034, A171263, A171264.
%K fini,nonn
%O 1,1
%A _M. F. Hasler_ and _Farideh Firoozbakht_, Apr 15 2010