A378867 Numbers k such that 5^k + 86 is prime.

3, 27, 179, 507, 4671, 4923, 5871, 7571, 19551, 19955

Offset

1,1

Comments

a(11) > 10^5. - Michael S. Branicky, Dec 22 2024

Links

Table of n, a(n) for n=1..10.

Example

3 is a term because 5^3 + 86 = 211 is prime.

Mathematica

Select[Range[0, 5000], PrimeQ[5^#+86]&]

Prog

(Magma) [k: k in [0..1000] |IsPrime (5^k+86)];

Crossrefs

Cf. A089142, A124621, A217133.

Sequence in context: A053932 A027507 A297670 * A220820 A370710 A241271

Adjacent sequences: A378864 A378865 A378866 * A378868 A378869 A378870

Keyword

nonn,more

Author

Robert Price, Dec 09 2024

Extensions

a(5)-a(10) from Vincenzo Librandi, Dec 17 2024

Status

approved