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

5, 162287, 13055867207, 1719070799748422589190392551, 174588755932389037098918153698589675008087, 307180606913594390117978657628360735703373091543821695941623353827100004182413811352186951

Offset

1,1

Comments

The next term is too large to include.

See A117706 for the corresponding numbers x.

The next term has 113 digits. - Harvey P. Dale, Jan 17 2018

Links

Table of n, a(n) for n=1..6.

Mathematica

Select[Table[6^x-x^6, {x, 200}], PrimeQ] (* Harvey P. Dale, Jan 17 2018 *)

Prog

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

Crossrefs

Cf. A024068, A123206, A163319.

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

Sequence in context: A366270 A236066 A151589 * A038027 A237641 A057679

Adjacent sequences: A243111 A243112 A243113 * A243115 A243116 A243117

Keyword

nonn

Author

M. F. Hasler, Aug 20 2014

Status

approved