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A034924 Numbers n such that 47^n-46 is prime. 0

%I

%S 5,11,13,53,115,899

%N Numbers n such that 47^n-46 is prime.

%C Related to hyperperfect numbers of a certain form.

%H J. S. McCranie, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL3/mccranie.html">A study of hyperperfect numbers</a>, J. Int. Seqs. Vol. 3 (2000) #P00.1.3.

%t Select[Range[2000], PrimeQ[47^# - 46] &] (* _Vincenzo Librandi_, Sep 26 2012 *)

%o (PARI) is(n)=ispseudoprime(47^n-46) \\ _Charles R Greathouse IV_, Jun 13 2017

%K nonn,more

%O 1,1

%A _Jud McCranie_

%E a(6) from _Vincenzo Librandi_, Sep 26 2012

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Last modified June 16 14:56 EDT 2019. Contains 324152 sequences. (Running on oeis4.)