%I #3 Dec 05 2013 19:56:52

%S 2,7,795302832777615

%N Greatest prime divisor of n-th partial concatenation is prime(n).

%e Greatest prime divisor of 27795302832777615 which is a concatenation of first four terms 2,7,795302832777615 is prime(3) = 5, 27795302832777615= 3^33*5.

%Y Cf. A095216.

%K base,more,nonn,bref

%O 1,1

%A _Amarnath Murthy_, Jun 10 2004