Compact formula | 199779992[162166243] + 199011208[225823278] + 275831916[284862638] + 19190270[403478642] - 189340178[657922943] + 87928872[727507932] + 223433268[1498434239/2] - 383934934[4417955351/2] + 268000698[5606994804] + 114409694[7804016832] - 50397484[27894683333/2] + 58423876[74522099649/2] - 434021188[66492889557] + 50208530[68844144046] + 57905980[190122366697] + 30829306[293153860797] - 158700948[169838669284032] |
Lehmer's measure | 1.74957 |
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 11 August 2006.] |