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Numbers k such that 136^k - 135^k is prime.
0

%I #27 Oct 15 2024 08:29:44

%S 2,7,53,103,1171,1699,5953,29131

%N Numbers k such that 136^k - 135^k is prime.

%t Select[Range[2, 200], PrimeQ[(136^# - 135^#)] &] (* _Vincenzo Librandi_, Jul 01 2015 *)

%o (Magma) [n: n in [0..200] | IsPrime(136^n-135^n)]; // _Vincenzo Librandi_, Jul 01 2015

%o (PARI) is(n)=ispseudoprime(136^n-135^n) \\ _Charles R Greathouse IV_, Jun 13 2017

%Y Cf. A254298.

%K nonn,more

%O 1,1

%A _Michael P. May_, Jun 29 2015

%E a(5)-a(6) from _Vincenzo Librandi_, Jul 01 2015

%E a(7) from _Tim Johannes Ohrtmann_, Mar 16 2018

%E a(8) from _Michael S. Branicky_, Oct 14 2024