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Largest prime <= 6^n.
2

%I #3 Oct 01 2013 17:58:09

%S 5,31,211,1291,7759,46649,279919,1679609,10077689,60466169,362796997,

%T 2176782317,13060693999,78364164083,470184984569,2821109907437,

%U 16926659444687,101559956668403,609359740010477,3656158440062969

%N Largest prime <= 6^n.

%o (PARI) g(n,b) = for(x=0,n,print1(precprime(b^x)","))

%K easy,nonn

%O 1,1

%A _Cino Hilliard_, Mar 03 2005