A104118 Primes of the form 6^n+5.

11, 41, 1301, 279941, 60466181, 78364164101, 101559956668421, 7958661109946400884391941, 6285195213566005335561053533150026217291781, 23519470446002552619480849617690081539337173577026375375550590789301897093185541

Offset: 1

Author

Roger L. Bagula, Mar 05 2005

Keywords

• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..15

Crossrefs

Cf. A145106.

Programs

Magma

[ a: n in [0..250] | IsPrime(a) where a is 6^n+5]; // Vincenzo Librandi, Jan 28 2011

Mathematica

Select[Table[6^n+5,{n,0,800}],PrimeQ] (* Vincenzo Librandi Jul 19 2012 *)

Formula

a(n) = 6^A145106(n)+5. - Jason Yuen, Sep 01 2024

Extensions

a(10) corrected by Vincenzo Librandi, Jul 19 2012