Compact formula | 3282161352[2189376182] + 2096472596[5493779561/2] + 3319338608[4038832337] + 641644692[6608082112] - 1024595576[16758521543/2] - 431594592[9392165427] - 982772732[12957904393] - 499507264[36523075989/2] + 4146405860[18710140581] + 2741564108[29546599818] + 1105169276[38185029043] - 5356900404[112899039159/2] - 3577811368[265542904947] + 787403960[378137211957] - 3233902492[579766497643] + 985435188[3737240479718] + 678860828[11830545643782] - 2155800460[46150510628682] - 2479675500[69971515635443] + 599437000[24412992821228897] |
Lehmer's measure | 1.81807 |
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 8 November 2000.] |