M000000215

$$\pi=671135852\arctan\left(\frac{1}{284862638}\right)+700881884\arctan\left(\frac{1}{727507932}\right)-465237016\arctan\left(\frac{1}{975671568}\right)+396249068\arctan\left(\frac{1}{1206519637}\right)-190742444\arctan\left(\frac{2}{2955461161}\right)+50019576\arctan\left(\frac{1}{2275976307}\right)-425015100\arctan\left(\frac{1}{5610778932}\right)+123161272\arctan\left(\frac{1}{6330214818}\right)+58947708\arctan\left(\frac{1}{8120692247}\right)+441917328\arctan\left(\frac{1}{12557637490}\right)+248554796\arctan\left(\frac{1}{12924735728}\right)+894859064\arctan\left(\frac{1}{15581121177}\right)+486603080\arctan\left(\frac{2}{74522099649}\right)-289446008\arctan\left(\frac{1}{138873731225}\right)+397749472\arctan\left(\frac{1}{168722145007}\right)+605300516\arctan\left(\frac{1}{652805871949}\right)+762381596\arctan\left(\frac{1}{1212754476068}\right)+131122968\arctan\left(\frac{1}{169838669284032}\right)$$