🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaTiếng ViệtРусский中文日本語EntityQ951293· pop 18· linked from 298 articlesWoodall numbernatural number of the form n2^n − 1ConnectionsPerrin numberEntityprime numberEntityCategoriesClasses of prime numbersInteger sequencesUnsolved problems in number theory