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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
39.2-b1 39.2-b \(\Q(\sqrt{157}) \) \( 3 \cdot 13 \) $1$ $\mathsf{trivial}$ $\mathrm{SU}(2)$ $0.555699910$ $2.193832103$ 5.643153734 \( \frac{30994677524215436107}{150780939070647951} a - \frac{16201418628140718394}{11598533774665227} \) \( \bigl[1\) , \( -a\) , \( a + 1\) , \( -382 a - 2189\) , \( 170330 a + 981950\bigr] \) ${y}^2+{x}{y}+\left(a+1\right){y}={x}^{3}-a{x}^{2}+\left(-382a-2189\right){x}+170330a+981950$
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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.