Compact formula | - 4365018708[32863722478] + 18338362496[86479075199/2] + 80023227124[112899039159/2] + 118194530516[134062280661/2] + 56609562220[71617196968] - 39593284668[78535779057] + 26606768824[102428655030] - 25243557200[116206866693] - 2682724352[197877956739] - 130816309116[204190585273] - 34924321236[225891903693] + 102418273252[283378114193] - 71861488720[324363564309] + 48212456716[469027618483] - 37166514220[492806748932] + 14547679520[821345641657] - 141692479612[3737240479718] + 85844390500[28148191112477] - 9302439992[55707370528529] - 19301719956[69971515635443] - 25223596448[109805699900318] - 114234909480[7474541196075273] |
Lehmer's measure | 1.86702 |
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 17 December 2003.] |