Compact formula | - 6412664780[112899039159/2] + 13705899640[115004793075/2] + 58955716200[102428655030] + 162769131516[120563046313] + 38479033164[258565442223/2] - 40299203872[146235453343] - 3042457152[157245105893] + 173495438400[191092631540] + 37078794300[378137211957] + 83618697200[1097963074309/2] + 72962823032[798587208809] - 64484206692[810494143407] - 57177168152[1029114662298] - 57672334908[2196973730667] - 7666771340[2267426627682] - 845501940[3037967579288] + 8071619188[3737240479718] - 24615557864[10463035477341] + 18057812868[14113057272907] - 1324486648[15962244871097] + 67185176836[53518224361625/2] + 51894688712[150361024828932] - 71109651776[74295753693510382] |
Lehmer's measure | 1.90181 |
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 Amrik Singh Nimbran on 16 June 2011.] |