Solution
= Solution
For an odd <prime> $p$, the <Legendre symbol> is $\boxed{(a/p)=0}$ if $p\mid a$, $\boxed{(a/p)=1}$ if $a$ is a nonzero square modulo $p$, and $\boxed{(a/p)=-1}$ otherwise. It depends only on the <residue> class of $a$.
= Solution
For an odd <prime> $p$, the <Legendre symbol> is $\boxed{(a/p)=0}$ if $p\mid a$, $\boxed{(a/p)=1}$ if $a$ is a nonzero square modulo $p$, and $\boxed{(a/p)=-1}$ otherwise. It depends only on the <residue> class of $a$.