OFFSET
1,1
COMMENTS
Every Fermat number greater than 257 has a prime factor of the form 384*n + 257, n > 0.
LINKS
Wikipedia, Fermat number
MATHEMATICA
Select[Table[384*n + 257, {n, 0, 115}], PrimeQ]
PROG
(Magma) [384*n+257 : n in [0..115] | IsPrime(384*n+257)]
CROSSREFS
KEYWORD
nonn
AUTHOR
Arkadiusz Wesolowski, Oct 01 2013
STATUS
approved