{"id":2786,"date":"2026-06-10T10:50:20","date_gmt":"2026-06-10T01:50:20","guid":{"rendered":"https:\/\/semboku-h.ed.jp\/ssh\/?p=2786"},"modified":"2026-06-17T11:03:41","modified_gmt":"2026-06-17T02:03:41","slug":"2026-06-10-%e7%b6%9a%e5%a0%b1%e4%b8%96%e7%95%8c%e5%88%9d%e4%b8%96%e7%95%8c%e3%81%a7%e5%88%9d%e3%82%81%e3%81%a6%e6%9c%80%e5%b0%8f%e3%81%ae%e5%a5%87%e6%95%b079-%e5%80%8d%e9%81%8e%e5%89%b0%e6%95%b0","status":"publish","type":"post","link":"https:\/\/semboku-h.ed.jp\/ssh\/2026\/06\/10\/2026-06-10-%e7%b6%9a%e5%a0%b1%e4%b8%96%e7%95%8c%e5%88%9d%e4%b8%96%e7%95%8c%e3%81%a7%e5%88%9d%e3%82%81%e3%81%a6%e6%9c%80%e5%b0%8f%e3%81%ae%e5%a5%87%e6%95%b079-%e5%80%8d%e9%81%8e%e5%89%b0%e6%95%b0\/","title":{"rendered":"2026.06.10. \u7d9a\u5831!\u4e16\u754c\u521d!!\u4e16\u754c\u3067\u521d\u3081\u3066\u6700\u5c0f\u306e\u5947\u65707~9 \u500d\u904e\u5270\u6570\u3092\u767a\u898b!"},"content":{"rendered":"<p>June 10, 2026: Follow-up Report \u2014 World-First Discovery of the Smallest Odd 7-, 8-, and 9- Abundant Numbers<\/p>\n<p>\u6cc9\u5317\u9ad8\u6821 56 \u671f\u751f\u306e\u6570\u5b66 1 \u73ed\u306e\u30ea\u30fc\u30c0\u30fc\u6c38\u901a \u60a0\u4f0d(\u5199\u771f\u5de6\u304b\u30891\u756a\u76ee)\u304c\u6700\u5c0f\u306e\u5947\u65707~9 \u500d\u904e\u5270\u6570\u3092\u767a\u898b\u3057\u307e\u3057\u305f\u3002<br \/>\n4 \u6708\u306b\u6570\u5b661\u73ed\u304c\u767a\u8868\u3057\u305f<a href=\"https:\/\/semboku-h.ed.jp\/ssh\/2026\/04\/25\/2026-04-24%e4%b8%96%e7%95%8c%e5%88%9d%ef%bc%81%e6%b3%89%e5%8c%97%e9%ab%98%e6%a0%a156%e6%9c%9f%e7%94%9f%e6%95%b0%e5%ad%a6%e7%8f%ad%e3%81%8c%e6%9c%80%e5%b0%8f%e3%81%ae%e5%a5%87%e6%95%b06%e5%80%8d\/\">\u6700\u5c0f\u306e\u5947\u65706\u500d\u904e\u5270\u6570\u306e\u7814\u7a76<\/a>\u3092\u6c38\u901a \u60a0\u4f0d\u304c\u767a\u5c55\u3055\u305b\u3001\u6700\u5c0f\u306e\u5947\u65707~9 \u500d\u904e\u5270\u6570\u306e\u767a\u898b\u306b\u81f3\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>\u3053\u308c\u307e\u3067\u306b\u6700\u5c0f\u306e\u5947\u6570 2 \u500d\u904e\u5270\u6570\u304b\u3089\u6700\u5c0f\u306e\u5947\u6570 5 \u500d\u904e\u5270\u6570\u307e\u3067\u306f\u767a\u898b\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u6700\u5c0f\u306e\u5947\u6570 6 \u500d\u4ee5\u4e0a\u306e\u904e\u5270\u6570\u306f\u4e16\u754c\u7684\u306b\u3082\u77e5\u3089\u308c\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002<br \/>\n2026 \u5e74 4 \u6708 24 \u65e5\u306b\u300156 \u671f\u751f\u6570\u5b661\u73ed\u304c\u72ec\u81ea\u306e\u65b9\u6cd5\u3067 4500 \u756a\u76ee\u307e\u3067\u306e\u5947\u6570\u8d85\u904e\u5270\u6570(4500 \u756a\u76ee\u306e\u5947\u6570\u8d85\u904e\u5270\u6570\u306f 917 \u6841)\u3092\u8a08\u7b97\u3057\u3001\u6700\u5c0f\u306e\u5947\u65706\u500d\u904e\u5270\u6570(1851 \u756a\u76ee\u306e\u5947\u6570\u8d85\u904e\u5270\u6570)\u3092\u767a\u898b\u3057\u305f\u3053\u3068\u3092\u5831\u544a\u3057\u307e\u3057\u305f\u3002<br \/>\n\u6570\u5b66 1 \u73ed\u306e\u30ea\u30fc\u30c0\u30fc\u6c38\u901a \u60a0\u4f0d\u306f\u3001\u5947\u6570\u8d85\u904e\u5270\u6570\u306e\u8a08\u7b97\u624b\u7d9a\u304d\u3092\u6574\u7406\u3001\u6539\u826f\u3059\u308b\u3053\u3068\u3067\u3001\u8a08\u7b97\u80fd\u529b\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u3001 20685 \u756a\u76ee\u307e\u3067\u306e\u5947\u6570\u8d85\u904e\u5270\u6570(20685 \u756a\u76ee\u306e\u5947\u6570\u8d85\u904e\u5270\u6570\u306f3848 \u6841)\u3092\u8a08\u7b97\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u305d\u3057\u3066\u6700\u5c0f\u306e\u5947\u6570 7 \u500d\u904e\u5270\u6570(5646 \u756a\u76ee\u306e\u5947\u6570\u8d85\u904e\u5270\u6570\u30011142 \u6841)\u3068\u3001\u6700\u5c0f\u306e\u5947\u6570 8 \u500d\u904e\u5270\u6570(19083 \u756a\u76ee\u306e\u5947\u6570\u8d85\u904e\u5270\u6570\u30013489 \u6841)\u3092\u767a\u898b\u3057\u307e\u3057\u305f\u3002\u3055\u3089\u306b\u3001\u63a2\u7d22\u7bc4\u56f2\u3068\u30c7\u30fc\u30bf\u306e\u8a18\u9332\u65b9\u6cd5\u3092\u5909\u3048\u308b\u3053\u3068\u306b\u3088\u308a\u6700\u5c0f\u306e\u5947\u6570 9 \u500d\u904e\u5270\u6570(56917 \u756a\u76ee\u306e\u5947\u6570\u8d85\u904e\u5270\u6570\u300110691 \u6841)\u3092\u767a\u898b\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u6700\u5c0f\u306e\u5947\u65707~9\u500d\u904e\u5270\u6570\u3001\u304a\u3088\u3073\u82f1\u6587\u306f<span style=\"font-size: 24pt;\"><a href=\"http:\/\/semboku-h.ed.jp\/ssh\/wp-content\/uploads\/2026\/06\/bc2eccc4ba74a4d215004968ccb95261.pdf\">\u3053\u3061\u3089<\/a><\/span>\u306b\u63b2\u8f09\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>20685\u756a\u76ee\u307e\u3067\u306e\u8d85\u904e\u4e57\u6570\u306e\u8868\u306f<a href=\"http:\/\/semboku-h.ed.jp\/ssh\/wp-content\/uploads\/2026\/06\/eafd6a6c2c420ad468bf03dbf60da60b.pdf\"><span style=\"font-size: 24pt;\">\u3053\u3061\u3089<\/span><\/a>\u3067\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-2766\" src=\"http:\/\/semboku-h.ed.jp\/ssh\/wp-content\/uploads\/2026\/06\/1000006743-1024x576.jpeg\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/semboku-h.ed.jp\/ssh\/wp-content\/uploads\/2026\/06\/1000006743-1024x576.jpeg 1024w, https:\/\/semboku-h.ed.jp\/ssh\/wp-content\/uploads\/2026\/06\/1000006743-300x169.jpeg 300w, https:\/\/semboku-h.ed.jp\/ssh\/wp-content\/uploads\/2026\/06\/1000006743-768x432.jpeg 768w, https:\/\/semboku-h.ed.jp\/ssh\/wp-content\/uploads\/2026\/06\/1000006743-1536x864.jpeg 1536w, https:\/\/semboku-h.ed.jp\/ssh\/wp-content\/uploads\/2026\/06\/1000006743-1156x650.jpeg 1156w, https:\/\/semboku-h.ed.jp\/ssh\/wp-content\/uploads\/2026\/06\/1000006743.jpeg 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<p>\u7814\u7a76\u8ad6\u6587\u306b\u3064\u3044\u3066\u306f\u73fe\u5728\u6e96\u5099\u4e2d\u3067\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><b>\uff5eDiscovery of the Smallest Odd 7- to 9-Abundant Numbers\uff5e<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Yugo Nagamichi (first from the left in the photo), the leader of the Mathematics Group 1 from the 56th graduating class at Semboku High School, has achieved a world-first discovery by identifying the smallest odd 7-, 8-, and 9-abundant numbers.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This breakthrough was achieved by Nagamichi, who independently advanced the group&#8217;s previous research on the smallest odd 6-abundant number published in April.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">While the smallest odd 2-abundant through 5-abundant numbers had been previously identified, any odd <\/span><b><i>n<\/i><\/b><span style=\"font-weight: 400;\">-abundant numbers for <\/span><b><i>n<\/i><\/b><span style=\"font-weight: 400;\">&gt;=6 remained entirely unknown to the global mathematical community. On April 24, 2026, the 56th Batch Mathematics Group 1 reported their initial discovery of the smallest odd 6-abundant number (corresponding to the 1,851st odd superabundant number). They accomplished this by utilizing an original methodology to compute odd superabundant numbers up to the 4,500th term, where the 4,500th term spans 917 digits.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Building upon this foundation, the group leader, Yugo Nagamichi, successfully optimized and refined the computational procedures for odd superabundant numbers. This algorithmic improvement drastically enhanced processing capability, enabling him to compute up to the 20,685th odd superabundant number, which reaches 3,848 digits. Through this computation, he successfully discovered the smallest odd 7-abundant number (the 5,646th odd superabundant number, consisting of 1,142 digits) and the smallest odd 8-abundant number (the 19,083rd odd superabundant number, consisting of 3,489 digits). Furthermore, by adapting the search range and modifying the data-logging methodology, he went on to discover the smallest odd 9-abundant number (the 56,917th odd superabundant number, spanning a monumental 10,691 digits).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The complete values for the smallest odd 7- to 9-abundant numbers are available in the following PDF file.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The research paper detailing these findings and the comprehensive data is currently in preparation for publication.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>June 10, 2026: Follow-up Report \u2014 World-First Discovery of the Smallest Odd 7-, 8-, and 9- Abundant Numbers \u6cc9\u5317 [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":2766,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[78,45,8,6,33,4],"tags":[],"class_list":["post-2786","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-78","category-45","category-8","category-6","category-33","category-4"],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/semboku-h.ed.jp\/ssh\/wp-content\/uploads\/2026\/06\/1000006743.jpeg","_links":{"self":[{"href":"https:\/\/semboku-h.ed.jp\/ssh\/wp-json\/wp\/v2\/posts\/2786","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/semboku-h.ed.jp\/ssh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/semboku-h.ed.jp\/ssh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/semboku-h.ed.jp\/ssh\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/semboku-h.ed.jp\/ssh\/wp-json\/wp\/v2\/comments?post=2786"}],"version-history":[{"count":10,"href":"https:\/\/semboku-h.ed.jp\/ssh\/wp-json\/wp\/v2\/posts\/2786\/revisions"}],"predecessor-version":[{"id":2797,"href":"https:\/\/semboku-h.ed.jp\/ssh\/wp-json\/wp\/v2\/posts\/2786\/revisions\/2797"}],"wp:attachment":[{"href":"https:\/\/semboku-h.ed.jp\/ssh\/wp-json\/wp\/v2\/media?parent=2786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/semboku-h.ed.jp\/ssh\/wp-json\/wp\/v2\/categories?post=2786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/semboku-h.ed.jp\/ssh\/wp-json\/wp\/v2\/tags?post=2786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}