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Label Class Base field Conductor norm Rank Torsion CM Sato-Tate Regulator Period Leading coeff j-invariant Weierstrass coefficients Weierstrass equation
64.1-a2 64.1-a \(\Q(\zeta_{7})^+\) \( 2^{6} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $1.746658170$ 0.561425840 \( 32070217982944608 a^{2} - 72061125694419920 a + 25718317995977536 \) \( \bigl[0\) , \( -a\) , \( 0\) , \( 72 a^{2} + 4 a - 264\) , \( 500 a^{2} - 16 a - 1624\bigr] \) ${y}^2={x}^{3}-a{x}^{2}+\left(72a^{2}+4a-264\right){x}+500a^{2}-16a-1624$
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  *The rank, regulator and analytic order of Ш are not known for all curves in the database; curves for which these are unknown will not appear in searches specifying one of these quantities.