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Catalan's constant
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==Known digits== The number of known digits of Catalan's constant {{mvar|G}} has increased dramatically during the last decades. This is due both to the increase of performance of computers as well as to algorithmic improvements.<ref name=Gourdon>{{cite web|last1=Gourdon|first1=X.|last2=Sebah|first2=P.|url=http://numbers.computation.free.fr/Constants/constants.html|title=Constants and Records of Computation|access-date=11 September 2007}}</ref> {| class="wikitable" style="margin: 1em auto 1em auto" |+ Number of known decimal digits of Catalan's constant {{mvar|G}} ! Date || Decimal digits || Computation performed by |- | 1832 ||align="right"| 16 || [[Thomas Clausen (mathematician)|Thomas Clausen]] |- | 1858 ||align="right"| 19 || Carl Johan Danielsson Hill |- | 1864 ||align="right"| 14 || [[Eugène Charles Catalan]] |- | 1877 ||align="right"| 20 || [[James Whitbread Lee Glaisher|James W. L. Glaisher]] |- | 1913 ||align="right"| 32 || [[James Whitbread Lee Glaisher|James W. L. Glaisher]] |- | 1990 ||align="right"| {{val|20000}} || Greg J. Fee |- | 1996 ||align="right"| {{val|50000}} || Greg J. Fee |- | August 14, 1996 ||align="right"| {{val|100000}} || Greg J. Fee & [[Simon Plouffe]] |- | September 29, 1996 ||align="right"| {{val|300000}} || Thomas Papanikolaou |- | 1996 ||align="right"| {{val|1500000}} || Thomas Papanikolaou |- | 1997 ||align="right"| {{val|3379957}} || Patrick Demichel |- | January 4, 1998 ||align="right"| {{val|12500000}} || Xavier Gourdon |- | 2001 ||align="right"| {{val|100000500}} || Xavier Gourdon & Pascal Sebah |- | 2002 ||align="right"| {{val|201000000}} || Xavier Gourdon & Pascal Sebah |- | October 2006 ||align="right"| {{val|5000000000}} || Shigeru Kondo & Steve Pagliarulo<ref>{{Cite web |url=http://ja0hxv.calico.jp/pai/ecatalan.html |title=Shigeru Kondo's website |access-date=2008-01-31 |archive-url=https://web.archive.org/web/20080211185703/http://ja0hxv.calico.jp/pai/ecatalan.html |archive-date=2008-02-11 |url-status=dead }}</ref> |- | August 2008 ||align="right"| {{val|10000000000}} || Shigeru Kondo & Steve Pagliarulo<ref name=Gourdon /> |- | January 31, 2009 ||align="right"| {{val|15510000000}} || Alexander J. Yee & Raymond Chan<ref name=yee_chan>{{cite web| url = http://www.numberworld.org/nagisa_runs/computations.html| title = Large Computations |accessdate=31 January 2009}}</ref> |- | April 16, 2009 ||align="right"| {{val|31026000000}} || Alexander J. Yee & Raymond Chan<ref name=yee_chan/> |- | June 7, 2015 ||align="right"| {{val|200000001100}} || Robert J. Setti<ref name=setti>{{cite web| url = http://www.numberworld.org/digits/Catalan/| title = Catalan's constant records using YMP |access-date=14 May 2016}}</ref> |- | April 12, 2016 ||align="right"| {{val|250000000000}} || Ron Watkins<ref name=setti/> |- | February 16, 2019 ||align="right"| {{val|300000000000}} || Tizian Hanselmann<ref name=setti/> |- | March 29, 2019 ||align="right"| {{val|500000000000}} || Mike A & Ian Cutress<ref name=setti/> |- | July 16, 2019 ||align="right"| {{val|600000000100}} || Seungmin Kim<ref name=yee>{{cite web |url = http://www.numberworld.org/y-cruncher/ |title = Catalan's constant records using YMP |archive-url=https://web.archive.org/web/20190722034426/http://www.numberworld.org/y-cruncher/ |archive-date=22 July 2019 |url-status=dead |access-date=22 July 2019}}</ref><ref name=kim>{{cite web| url = https://ehfd.github.io/world-record/catalans-constant/| title = Catalan's constant world record by Seungmin Kim| date = 23 July 2019 |access-date=17 October 2020}}</ref> |- | September 6, 2020 ||align="right"| {{val|1000000001337}} || Andrew Sun<ref name=yrecord>{{Cite web|title=Records set by y-cruncher|url=http://www.numberworld.org/y-cruncher/records.html|access-date=2022-02-13|website=www.numberworld.org}}</ref> |- | March 9, 2022 ||align="right"| {{val|1200000000100}} || Seungmin Kim<ref name=yrecord/> |- |}
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