Obtained from curve #1093, due to Dujella–Lecacheux, which has rank at least 5 and torsion \(\mathbf Z/8\mathbf Z\). Quotienting by its rational point of order 2 gives a 2-isogenous curve whose global minimal model has ainvs \([1,0,0,-305209366509156400979315990,2052318850802631274310734280222290328100]\), torsion \(\mathbf Z/2\mathbf Z\times\mathbf Z/4\mathbf Z\), and conductor \(3985472961137327010\). The five independent source points were mapped through the isogeny, yielding five independent points on the quotient. The isogeny, minimal model, conductor, torsion and image points were verified in Magma.
jesper-petersen ·