

A034923


Numbers n such that 43^n42 is prime.


0




OFFSET

1,1


COMMENTS

Related to hyperperfect numbers of a certain form.
The 1017 term produces a 1662digit number which is only a probable prime. Any additional terms are greater than 1500.
The next terms are > 3000.  Vincenzo Librandi, Sep 27 2012


LINKS

Table of n, a(n) for n=1..6.
J. S. McCranie, A study of hyperperfect numbers, J. Int. Seqs. Vol. 3 (2000) #P00.1.3.


MATHEMATICA

Select[Range[1500], PrimeQ[43^#  42] &] (* Vincenzo Librandi, Sep 27 2012 *)


PROG

(PARI) for(n=2, 1500, if(isprime(43^n42), print1(n, ", ")))


CROSSREFS

Sequence in context: A175349 A023644 A145387 * A013022 A012908 A077100
Adjacent sequences: A034920 A034921 A034922 * A034924 A034925 A034926


KEYWORD

nonn,more


AUTHOR

Jud McCranie


EXTENSIONS

a(6) from Rick L. Shepherd, Jun 21 2002


STATUS

approved



