OFFSET
1,1
COMMENTS
No other terms for k < 3000. - T. D. Noe, Apr 25 2012
Apart from the first term, the exponents must be powers of two. Like Fermat primes, there are probably only finitely many terms. No more terms for k < 2^28 = 268435456. - Charles R Greathouse IV, Jul 16 2012
LINKS
MATHEMATICA
Select[Table[6^n + 1, {n, 0, 100}], PrimeQ] (* T. D. Noe, Apr 25 2012 *)
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Alex Ratushnyak, Apr 25 2012
STATUS
approved