Fermat prime
= Fermat prime
{c}
{wiki}
A Fermat prime is a <prime number> of the form
$$
F_k=2^{2^k}+1.
$$
For $k\geq1$, it is congruent to $1$ modulo $4$ and to $2$ modulo $3$.
= Fermat prime
{c}
{wiki}
A Fermat prime is a <prime number> of the form
$$
F_k=2^{2^k}+1.
$$
For $k\geq1$, it is congruent to $1$ modulo $4$ and to $2$ modulo $3$.