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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-a7 9.1-a \(\Q(\sqrt{13}) \) \( 3^{2} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $1.712469082$ 0.474953467 \( \frac{1794398270320625}{282429536481} a + \frac{2024459751037750}{282429536481} \) \( \bigl[a\) , \( -a - 1\) , \( 0\) , \( 5 a - 44\) , \( 51 a - 168\bigr] \) ${y}^2+a{x}{y}={x}^{3}+\left(-a-1\right){x}^{2}+\left(5a-44\right){x}+51a-168$
27.1-a7 27.1-a \(\Q(\sqrt{13}) \) \( 3^{3} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $1.566384751$ 0.868873929 \( \frac{1794398270320625}{282429536481} a + \frac{2024459751037750}{282429536481} \) \( \bigl[1\) , \( a - 1\) , \( 1\) , \( -26 a - 119\) , \( 340 a + 10\bigr] \) ${y}^2+{x}{y}+{y}={x}^{3}+\left(a-1\right){x}^{2}+\left(-26a-119\right){x}+340a+10$
27.2-a7 27.2-a \(\Q(\sqrt{13}) \) \( 3^{3} \) 0 $\Z/6\Z$ $\mathrm{SU}(2)$ $1$ $2.349577127$ 0.868873929 \( \frac{1794398270320625}{282429536481} a + \frac{2024459751037750}{282429536481} \) \( \bigl[a + 1\) , \( -a\) , \( a + 1\) , \( 57 a - 194\) , \( -767 a + 1595\bigr] \) ${y}^2+\left(a+1\right){x}{y}+\left(a+1\right){y}={x}^{3}-a{x}^{2}+\left(57a-194\right){x}-767a+1595$
81.1-a7 81.1-a \(\Q(\sqrt{13}) \) \( 3^{4} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $2.149143493$ 1.192130317 \( \frac{1794398270320625}{282429536481} a + \frac{2024459751037750}{282429536481} \) \( \bigl[a\) , \( -a\) , \( a + 1\) , \( 41 a - 402\) , \( -1021 a + 4406\bigr] \) ${y}^2+a{x}{y}+\left(a+1\right){y}={x}^{3}-a{x}^{2}+\left(41a-402\right){x}-1021a+4406$
1521.1-h7 1521.1-h \(\Q(\sqrt{13}) \) \( 3^{2} \cdot 13^{2} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $1.788195475$ 0.991912381 \( \frac{1794398270320625}{282429536481} a + \frac{2024459751037750}{282429536481} \) \( \bigl[a + 1\) , \( 1\) , \( 0\) , \( -1311 a - 1768\) , \( 32250 a + 42283\bigr] \) ${y}^2+\left(a+1\right){x}{y}={x}^{3}+{x}^{2}+\left(-1311a-1768\right){x}+32250a+42283$
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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.