Home›Classes of prime numbers›safe prime🌐EnglishEnglishDeutschEspañolFrançaisItalianoPortuguêsTiếng ViệtРусскийالعربية中文日本語EntityQ2298723· pop 17safe primeSign in to saveprime number of the form 2p+1 where p is also primeAvailable in 17 languagesFrançaisDeutsch中文日本語РусскийItalianoالعربيةCzechDanishEsperantoFinnishHungarianSlovenianTamilTiếng Việtzh_yuevia Wikidata sitelinks · CC0CategoriesClasses of prime numbersTheory of cryptography