Compact formula | 369857996[112519818] - 24243152[194195097] - 21950424[230845763] - 31751648[285310891] + 253695712[1849507057] + 85545504[2340358307] + 255167644[2616939213] - 41363324[2674664693] - 175060324[2701984943] - 71485780[4309606382] + 108469648[7193374037] + 92456224[8818809606] - 215965576[11115923863] + 70531744[37042993723] + 134277824[48794637562] + 127682688[219231737743] + 18245792[74796038391693] |
Lehmer's measure | 1.76938 |
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 21 January 2001.] |