🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTürkçeРусскийالعربيةहिन्दी한국어中文日本語EntityQ878259· pop 26· linked from 157 articlesquadratic residueinteger that is a perfect square modulo some integerConnectionspolynomialEntityfieldEntityCategoriesModular arithmeticNP-complete problemsQuadratic residue