A182330 Primes of the form 5^k + 2.

3, 7, 127, 762939453127

Offset: 1

Author

Alex Ratushnyak, Apr 25 2012

Keywords

• nonn

Comments

Next term has 100 digits.

Links

• Amiram Eldar, Table of n, a(n) for n = 1..7

Crossrefs

Cf. A057735, A087885, A242328.

Programs

Mathematica

Select[Table[5^n + 2, {n, 0, 500}], PrimeQ] (* T. D. Noe, Apr 25 2012 *)

Formula

a(n) = A242328(A087885(n)). - Amiram Eldar, Jul 23 2025