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A243114 Primes of the form 6^x-x^6. 2


%S 5,162287,13055867207,1719070799748422589190392551,

%T 174588755932389037098918153698589675008087,

%U 307180606913594390117978657628360735703373091543821695941623353827100004182413811352186951

%N Primes of the form 6^x-x^6.

%C The next term is too large to include.

%C See A117706 for the corresponding numbers x.

%C The next term has 113 digits. - _Harvey P. Dale_, Jan 17 2018

%t Select[Table[6^x-x^6,{x,200}],PrimeQ] (* _Harvey P. Dale_, Jan 17 2018 *)

%o (PARI) for(x=1,1e5,ispseudoprime(p=6^x-x^6)&&print1(p","))

%Y Cf. A024068, A123206, A163319.

%Y Cf. A072180, A109387, A117705, A117706, A128447, A128448, A128449, A128450, A128451, A122003, A128453, A128454.

%K nonn

%O 1,1

%A _M. F. Hasler_, Aug 20 2014

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Last modified September 20 20:02 EDT 2020. Contains 337265 sequences. (Running on oeis4.)