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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
10.2-a2 10.2-a \(\Q(\sqrt{249}) \) \( 2 \cdot 5 \) $1$ $\Z/3\Z$ $\mathrm{SU}(2)$ $0.645624079$ $21.59673281$ 3.534500871 \( \frac{8025743347527}{1310720} a + \frac{29314806044891}{655360} \) \( \bigl[a\) , \( 0\) , \( a + 1\) , \( 102990805 a - 864079084\) , \( -1600261541361 a + 13425981367840\bigr] \) ${y}^2+a{x}{y}+\left(a+1\right){y}={x}^{3}+\left(102990805a-864079084\right){x}-1600261541361a+13425981367840$
10.2-b2 10.2-b \(\Q(\sqrt{249}) \) \( 2 \cdot 5 \) $1$ $\mathsf{trivial}$ $\mathrm{SU}(2)$ $2.117839919$ $1.762351193$ 0.946119306 \( \frac{8025743347527}{1310720} a + \frac{29314806044891}{655360} \) \( \bigl[a\) , \( 0\) , \( 1\) , \( -19947514 a - 147409408\) , \( -136332744923 a - 1007480841593\bigr] \) ${y}^2+a{x}{y}+{y}={x}^{3}+\left(-19947514a-147409408\right){x}-136332744923a-1007480841593$
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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.