{"height":"190","type":"rich","provider_url":"https://hatena.blog","categories":["OneLiner","Ruby"],"blog_url":"https://shokai.hatenadiary.org/","width":"100%","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fshokai.hatenadiary.org%2Fentry%2F20111225%2F1324777283\" title=\"n\u307e\u3067\u306e\u7d20\u6570\u3092\u6c42\u3081\u308b - \u6a4b\u672c\u8a73\u89e3\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"shokai","url":"https://shokai.hatenadiary.org/entry/20111225/1324777283","published":"2011-12-25 10:41:23","version":"1.0","blog_title":"\u6a4b\u672c\u8a73\u89e3","title":"n\u307e\u3067\u306e\u7d20\u6570\u3092\u6c42\u3081\u308b","author_url":"https://blog.hatena.ne.jp/shokai/","image_url":null,"description":"\u307f\u3087\u3046\u306b\u30b7\u30f3\u30d7\u30eb\u306b\u3067\u304d\u305f\u306e\u3067\u66f8\u3044\u3066\u304a\u304f ruby -e 'p 2.upto(ARGV[0].to_i).to_a.delete_if{|i| 2.upto(i/2).to_a.detect{|j|i%j == 0} }' 2000[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191\u2026"}