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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Lucky numbers of Euler ： ウィキペディア英語版 Lucky numbers of Euler Euler's "lucky" numbers are positive integers ''n'' such that ''x''2 + ''x'' + ''n'' is a prime number for ''x'' = 0, ..., ''n'' − 2. Leonhard Euler published the polynomial ''x''2 + ''x'' + 41 which produces prime numbers for all integer values of ''x'' from 0 to 39. Obviously, when ''x'' is equal to 40, the value cannot be prime anymore since it is divisible by 41. Only 6 numbers have this property, namely 2, 3, 5, 11, 17 and 41 . These numbers are not related to the lucky numbers generated by a sieve algorithm. ==See also== *Heegner number *List of topics named after Leonhard Euler *Formula for primes 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lucky numbers of Euler」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.