Source: wikibot/legendre-symbol
= Legendre symbol
{wiki=Legendre_symbol}
The Legendre symbol is a mathematical notation that provides a way to determine if a given integer is a quadratic residue modulo a prime number. Specifically, for an integer \\( a \\) and a prime \\( p \\), the Legendre symbol is denoted as: \\\[ \\left( \\frac\{a\}\{p\} \\right) \\\] It is defined as follows: 1. If \\( a \\) is congruent to 0 modulo \\( p \\) (i.e.