Re: How to show it the congruence is solvable (or not)?



In article <3jq5fdFqn8fpU1@xxxxxxxxxxxxxx>,
Konrad Viltersten <tmp1@xxxxxxxxxxxxxx> wrote:
>I have the following problem.
>x^2 - 221 y^2 = 188
>and i'm supposed to show if it's solvable or not.

Hint: 13 .
.