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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
9.1-a2 9.1-a \(\Q(\sqrt{13}) \) \( 3^{2} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $1.712469082$ 0.474953467 \( -\frac{1794398270320625}{282429536481} a + \frac{1272952673786125}{94143178827} \) \( \bigl[a + 1\) , \( 1\) , \( a + 1\) , \( -5 a - 40\) , \( -56 a - 157\bigr] \) ${y}^2+\left(a+1\right){x}{y}+\left(a+1\right){y}={x}^{3}+{x}^{2}+\left(-5a-40\right){x}-56a-157$
27.1-a2 27.1-a \(\Q(\sqrt{13}) \) \( 3^{3} \) 0 $\Z/6\Z$ $\mathrm{SU}(2)$ $1$ $2.349577127$ 0.868873929 \( -\frac{1794398270320625}{282429536481} a + \frac{1272952673786125}{94143178827} \) \( \bigl[a\) , \( 0\) , \( a\) , \( -59 a - 135\) , \( 766 a + 829\bigr] \) ${y}^2+a{x}{y}+a{y}={x}^{3}+\left(-59a-135\right){x}+766a+829$
27.2-a2 27.2-a \(\Q(\sqrt{13}) \) \( 3^{3} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $1.566384751$ 0.868873929 \( -\frac{1794398270320625}{282429536481} a + \frac{1272952673786125}{94143178827} \) \( \bigl[1\) , \( -a\) , \( 1\) , \( 26 a - 145\) , \( -340 a + 350\bigr] \) ${y}^2+{x}{y}+{y}={x}^{3}-a{x}^{2}+\left(26a-145\right){x}-340a+350$
81.1-a2 81.1-a \(\Q(\sqrt{13}) \) \( 3^{4} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $2.149143493$ 1.192130317 \( -\frac{1794398270320625}{282429536481} a + \frac{1272952673786125}{94143178827} \) \( \bigl[a + 1\) , \( -1\) , \( a\) , \( -43 a - 360\) , \( 1020 a + 3386\bigr] \) ${y}^2+\left(a+1\right){x}{y}+a{y}={x}^{3}-{x}^{2}+\left(-43a-360\right){x}+1020a+3386$
1521.1-h2 1521.1-h \(\Q(\sqrt{13}) \) \( 3^{2} \cdot 13^{2} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $1.788195475$ 0.991912381 \( -\frac{1794398270320625}{282429536481} a + \frac{1272952673786125}{94143178827} \) \( \bigl[a\) , \( -a - 1\) , \( a\) , \( 1312 a - 3083\) , \( -33562 a + 77613\bigr] \) ${y}^2+a{x}{y}+a{y}={x}^{3}+\left(-a-1\right){x}^{2}+\left(1312a-3083\right){x}-33562a+77613$
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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.