| Compact formula | 20[7] + 8[79/3] |
| Lehmer's measure | 1.88726 |
| References | Euler, Leonhard. Investigatio quarundam serierum, quae ad rationem peripheriae circuli ad diametrum vero proxime definiendam maxime sunt accommodatae, Nova acta academiae scientiarum Petropolitinae 11, 133–149, 1798. [Presented in 1779. Republished in Opera omnia, I.16, 1-20.] Vega, Jurij. Thesaurus Logarithmorum Completus, 1794. [Formula used on page 633.] |