１９９１年にこの数字が素数と証明された。
書き下すとこうなる。どこが「９」以外かわかります？
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１だけ自然数レピュニットというのもあるけれど１が１０３１個の素数が最大だそうだ。これは(10^1031-1)/9となる。
【参照元】
- 作者: クリフォード・A・ピックオーバー,糸川洋
- 出版社/メーカー: 日経BP社
- 発売日: 2011/01/20
- メディア: 単行本
- クリック: 5回
- この商品を含むブログ (4件) を見る
ちなみに「数学おもちゃ箱」は三種あった。
- 作者: イェ・イイグナーチェフ,松野武
- 出版社/メーカー: 東京図書
- 発売日: 1988/06/01
- メディア: 単行本
- この商品を含むブログ (2件) を見る
- 作者: 志賀弘典
- 出版社/メーカー: 日本評論社
- 発売日: 1999/06
- メディア: 単行本
- この商品を含むブログ (1件) を見る
- 作者: B.A.コルディエムスキー,物部長興
- 出版社/メーカー: みすず書房
- 発売日: 1961
- メディア: ?
- この商品を含むブログ (1件) を見る
