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>Google、円周率計算31兆桁達成　世界記録更新 https://www.bbc.com/japanese/47552083 https://www.google.com/search?client=firefox-b-d&q=%E5%86%86%E5%91%A8%E7%8E%8762%E5%85%868000%E5%84%84%E6%A1%81%E8%A8%88%E7%AE%97%E3%80%81%E4%B8%96%E7%95%8C%E8%A8%98%E9%8C%B2%E6%9B%B4%E6%96%B0+%E3%82%B9%E3%82%A4%E3%82%B9%E7%A0%94%E7%A9%B6%E3%83%81%E3%83%BC%E3%83%A0 https://www.wakuwaku-catch.net/kouen201102/