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%I A089137 #3 Oct 01 2013 17:57:46
%S A089137 5,23,59,719,5039,10079,181439,907199,7983359,479001599,622702079,
%T A089137 87178291199,326918591999,6974263295999,59281238015999,
%U A089137 1600593426431999,15205637551103999,405483668029439999,5676771352412159999
%N A089137 Primes in the progression (n!- m)/m where n advances by 1 and m resets to 1 upon each prime occurrence.
%e A089137 n=5,m=1 (5!-1)/1 = 119=7*17 not prime m advances to 2.
%e A089137 n=5,m=2 (5!-2)/2 = 118/2 = 59 prime keep it.
%o A089137 (PARI) nfactm2d2(n,m) = { for(x=1,n, for(k=1,m, y=floor((x!- k)/k); if(isprime(y),print1(y",");break) ) ) }
%K A089137 base,easy,nonn
%O A089137 1,1
%A A089137 _Cino Hilliard_, Dec 05 2003

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