A378866 Numbers k such that 5^k + 72 is prime.

0, 2, 3, 118, 498, 1023, 4262, 6094, 6382, 26334, 56062

Offset: 1

Author

Robert Price, Dec 09 2024

Keywords

• nonn
• more

Examples

			3 is a term because 5^3 + 72 = 197 is prime.
		

Crossrefs

Cf. A089142, A124621, A217133.

Programs

Magma

[k: k in [0..1000] |IsPrime (5^k+72)];

Mathematica

Select[Range[0,5000],PrimeQ[5^#+72]&]

Extensions

a(8)-a(11) from Michael S. Branicky, Dec 19 2024