M000000147

$$\pi=2378340\arctan\left(\frac{1}{2484568}\right)+7828660\arctan\left(\frac{1}{4218932}\right)+4951776\arctan\left(\frac{1}{11612398}\right)-2227876\arctan\left(\frac{1}{34713882}\right)-229816\arctan\left(\frac{1}{55153444}\right)-4124028\arctan\left(\frac{1}{113014933}\right)+1581476\arctan\left(\frac{1}{226983307}\right)+841916\arctan\left(\frac{2}{821598989}\right)-1106424\arctan\left(\frac{1}{1085592682}\right)-1663044\arctan\left(\frac{1}{2701984943}\right)-3713224\arctan\left(\frac{1}{5475957057}\right)+3419160\arctan\left(\frac{1}{6436804193}\right)-1054988\arctan\left(\frac{1}{14033378718}\right)+841916\arctan\left(\frac{1}{137499481467279382}\right)-841916\arctan\left(\frac{1}{1196602956151217979146736}\right)$$