%I #21 Jul 08 2023 14:08:04
%S 3,5,7,1201,13421,28393,22796593,563377,1117,470925821,1048563011,
%T 3512477579761,644522798011,22021301,24317675453761,
%U 14189041365214758401,21199857783625129028395239857,13842121,292354984050175817,613624820402521
%N Greatest prime factor of prime(n)^n+1.
%H Hugo Pfoertner and Amiram Eldar, <a href="/A069463/b069463.txt">Table of n, a(n) for n = 1..82</a> (terms 1..50 from Hugo Pfoertner)
%H Dario Alpern, <a href="https://www.alpertron.com.ar/ECM.HTM">Factorization using the Elliptic Curve Method.</a>
%H FactorDB, <a href="http://factordb.com/index.php?query=431%5E83%2B1">Status of 431^83+1</a>.
%F a(n) = A006530(A062006(n)).
%e A000040(10)^10+1 = 29^10+1 = 420707233300202 = 2*421*1061*470925821, therefore a(10) = 470925821.
%t Table[FactorInteger[Prime[n]^n+1][[-1,1]],{n,20}] (* _Harvey P. Dale_, Aug 23 2019 *)
%Y Cf. A069460.
%Y Cf. A006530, A062006.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Mar 24 2002
%E More terms from _Hugo Pfoertner_, May 21 2004