OFFSET
1,1
COMMENTS
Conjecture: There are infinitely many primes of the form 2^k + 3^k + 6.
EXAMPLE
2^1 + 3^1 + 6 = 11, which is a prime.
2^2 + 3^2 + 6 = 19, which is a prime.
MATHEMATICA
Select[Table[2^n + 3^n + 6, {n, 1, 1000}], PrimeQ]
CROSSREFS
KEYWORD
nonn
AUTHOR
Hemjyoti Nath, Apr 23 2022
STATUS
approved