🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaTiếng ViệtРусскийفارسی中文日本語EntityQ1812503· pop 20· linked from 40 articlesLegendre's conjectureconjecture that there is a prime between any two square numbersConnectionsOppermann's conjectureEntityFirst Hardy–Littlewood conjectureEntityCategoriesConjectures about prime numbersSquares in number theoryUnsolved problems in number theory