OFFSET

1,1

COMMENTS

The next term in the sequence is greater than 12400. - Dmitry Kamenetsky, Oct 02 2008

LINKS

Henri Lifchitz and Renaud Lifchitz, PRP Records.

EXAMPLE

65 is present because 6^65 - 5 is prime.

PROG

(PARI) is(n)=ispseudoprime(6^n-5) \\ Charles R Greathouse IV, Feb 20 2017

CROSSREFS

KEYWORD

nonn

AUTHOR

Andrey V. Kulsha, Feb 09 2001

EXTENSIONS

a(21), corresponding to a probable prime, from Dmitry Kamenetsky, Oct 02 2008

a(22)-a(23) from Henri Lifchitz

a(24)-a(25) from Lelio R. Paula

a(26) from Paul Bourdelais, Jan 28 2021

a(27) from Paul Bourdelais, Feb 26 2021

STATUS

approved