Compact formula | - 5445042390284[11244667034168] + 3571325365352[15962244871097] + 48159709961976[20293776947868] + 1050709890136[53518224361625/2] + 4951614234936[33308851938318] + 14871088490480[41887379804066] - 9588257242184[53453286489686] + 17025924962384[58705151760538] - 1125703157800[69971515635443] - 24332130318488[74285407663082] + 27629679331972[83979525486773] - 11870694330484[127528611030443] + 11988304005360[131001068999312] + 31054435639616[158682175700807] + 23165598591024[351408485766961/2] + 12291362112724[187458398552950] + 2967621927012[211773236092865] - 22929615338336[240926005152903] + 7599684952412[258213230677943] + 6417753699136[317335434728073] + 4912623992588[370392816588001] + 25184099732840[758341235653128] - 21584249661808[830202489183166] - 11866598412016[1086889881361383] + 37624116416980[1143900177872158] - 1950950403804[1427056404016693] - 23595226734360[2270451385422943] + 11624904640852[4204987898062723] - 22000466710316[6805164953551432] - 14388350768536[54969362078559518] |
Lehmer's measure | 2.09484 |
References | Wetherfield, Michael Roby and Chien-Lih, Hwang. Computing pi: Lists of Machin-type (inverse cotangent) identities for pi/4, [Online; accessed 04-February-2024], 2013. [web.archive.org/web/20240204042153/http] [Found by MRW on 19 August 2011.] |