A378868 Numbers k such that 5^k - 22 is prime.

2, 3, 31, 79, 491, 3019, 3623, 4175, 9957, 21963, 71637, 80551, 80831

Offset: 1

Author

Robert Price, Dec 09 2024

Keywords

• nonn
• more

Comments

a(14) > 10^5. - Michael S. Branicky, Dec 24 2024

Examples

			3 is a term because 5^3 - 22 = 103 is prime.
		

Crossrefs

Cf. A059613, A109080, A165701, A217134.

Programs

Magma

[k: k in [0..1000] |IsPrime (5^k-22)];

Mathematica

Select[Range[0,5000],PrimeQ[5^#-22]&]

Extensions

a(8)-a(10) from Michael S. Branicky, Dec 17 2024

a(11)-a(13) from Michael S. Branicky, Dec 22 2024