A089142 Numbers n such that 5^n + 6 is prime.

0, 1, 2, 3, 4, 13, 88, 177, 184, 297, 304, 310, 562, 892, 1300, 4047, 5557, 9028, 15597, 28527, 56890, 77485, 79378

Offset

1,3

Comments

a(24) > 10^5. - Robert Price, Feb 03 2014

Links

Table of n, a(n) for n=1..23.

Example

5^13 = 1220703131 a prime number

Prog

(PARI) is(n)=ispseudoprime(5^n+6) \\ Charles R Greathouse IV, May 22 2017

Crossrefs

Sequence in context: A010346 A295621 A295755 * A123215 A051855 A058070

Adjacent sequences: A089139 A089140 A089141 * A089143 A089144 A089145

Keyword

nonn

Author

Herman H. Rosenfeld (herm3(AT)pacbell.net), Dec 20 2003

Extensions

More terms from Ray Chandler, Dec 24 2003

a(1) = 0 added by Robert Price, Feb 03 2014

a(17)-a(23) from Robert Price, Feb 03 2014

Status

approved