M000000183

$$\pi=1787516\arctan\left(\frac{1}{1049433}\right)+1311422\arctan\left(\frac{1}{1264557}\right)+621942\arctan\left(\frac{1}{1706203}\right)+1007250\arctan\left(\frac{1}{1984933}\right)-384128\arctan\left(\frac{1}{2478328}\right)-458276\arctan\left(\frac{1}{3449051}\right)-1751858\arctan\left(\frac{1}{18975991}\right)-1233112\arctan\left(\frac{1}{21638297}\right)-374286\arctan\left(\frac{1}{22709274}\right)-343714\arctan\left(\frac{1}{24208144}\right)-503572\arctan\left(\frac{1}{201229582}\right)-865232\arctan\left(\frac{1}{2189376182}\right)$$