Compact formula | - 4365018708[32863722478] + 64813849154[86479075199/2] + 54779669924[112899039159/2] + 43987783620[71617196968] + 57369316390[78535779057] - 45112275034[102428655030] - 36536432410[197877956739] - 9680764036[225891903693] - 3154478664[283378114193] - 33853708058[632886751489/2] + 33711263196[324363564309] + 35590678116[469027618483] + 9308972438[492806748932] + 59097265258[573904314793] - 44549585738[821345641657] - 10876170496[3737240479718] + 12621778600[7407742635682] + 26747125242[28148191112477] - 43156148050[55707370528529] + 14551988102[69971515635443] - 25223596448[109805699900318] + 50435107694[7474541196075273] |
Lehmer's measure | 1.84556 |
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 26 March 2004.] |