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

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

Offset: 1

Author

Robert Price, Dec 09 2024

Keywords

• nonn
• more

Comments

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

Examples

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

Crossrefs

Cf. A089142, A124621, A217133.

Programs

Magma

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

Mathematica

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

Extensions

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