M000063

$$\pi=2324\arctan\left(\frac{1}{580}\right)-1592\arctan\left(\frac{1}{1710}\right)+332\arctan\left(\frac{1}{5832}\right)+908\arctan\left(\frac{1}{105218}\right)-48\arctan\left(\frac{2}{2513489}\right)+332\arctan\left(\frac{1}{6826318}\right)+908\arctan\left(\frac{1}{7167807}\right)$$
Compact formula2324[580] - 1592[1710] + 332[5832] + 908[105218] - 48[2513489/2] + 332[6826318] + 908[7167807]
Lehmer's measure1.59199
References
ASN (3Aug10) (full reference coming soon)