M000000256

$$\pi=30640352\arctan\left(\frac{1}{27872057}\right)+27077796\arctan\left(\frac{1}{29667568}\right)-27077796\arctan\left(\frac{1}{29878932}\right)+82773056\arctan\left(\frac{1}{82189674}\right)+29835920\arctan\left(\frac{1}{133311327}\right)+135691368\arctan\left(\frac{1}{227661182}\right)+104000852\arctan\left(\frac{1}{244653118}\right)-52596712\arctan\left(\frac{1}{284862638}\right)-17556312\arctan\left(\frac{1}{403478642}\right)+54153348\arctan\left(\frac{1}{403916362}\right)-72982796\arctan\left(\frac{1}{727507932}\right)+24867076\arctan\left(\frac{1}{1365179943}\right)-86147780\arctan\left(\frac{1}{2132621070}\right)+22673580\arctan\left(\frac{2}{74522099649}\right)-45837520\arctan\left(\frac{1}{106334643058}\right)+26080388\arctan\left(\frac{1}{134520516108}\right)$$