A291906 Numbers k such that (29^k + 1)/30 is a prime.

7, 112153, 151153

Offset

1,1

Comments

Only the first term is proved to be a prime (so far). The rest correspond to probable primes.

a(2) from Lelio R. Paula.

Links

Table of n, a(n) for n=1..3.

P. Bourdelais, A Generalized Repunit Conjecture, NMBRTHRY, 25 Jun 2009.

Henri & Renaud Lifchitz, PRP Records.

OEIS Wiki, Primes of the form (a^n+b^n)/(a+b) and (a^n-b^n)/(a-b).

Crossrefs

Sequence in context: A158816 A173839 A122000 * A090769 A013842 A247791

Adjacent sequences: A291903 A291904 A291905 * A291907 A291908 A291909

Keyword

nonn,more,bref

Author

Paul Bourdelais, Sep 05 2017

Status

approved