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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
287.2-b2 287.2-b \(\Q(\zeta_{7})^+\) \( 7 \cdot 41 \) 0 $\Z/2\Z\oplus\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $12.61392259$ 0.900994471 \( \frac{2192037233085291}{138462289} a^{2} + \frac{2267219548655833}{138462289} a - \frac{566434328572957}{138462289} \) \( \bigl[a^{2} - 2\) , \( -a^{2} - a + 2\) , \( a^{2} - 1\) , \( 26 a^{2} - 46 a - 102\) , \( 179 a^{2} - 200 a - 526\bigr] \) ${y}^2+\left(a^{2}-2\right){x}{y}+\left(a^{2}-1\right){y}={x}^{3}+\left(-a^{2}-a+2\right){x}^{2}+\left(26a^{2}-46a-102\right){x}+179a^{2}-200a-526$
2009.3-d5 2009.3-d \(\Q(\zeta_{7})^+\) \( 7^{2} \cdot 41 \) 0 $\Z/2\Z\oplus\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $18.63210072$ 1.330864337 \( \frac{2192037233085291}{138462289} a^{2} + \frac{2267219548655833}{138462289} a - \frac{566434328572957}{138462289} \) \( \bigl[a^{2} + a - 1\) , \( 0\) , \( 0\) , \( -131 a^{2} - 99 a + 3\) , \( 1047 a^{2} + 1119 a - 495\bigr] \) ${y}^2+\left(a^{2}+a-1\right){x}{y}={x}^{3}+\left(-131a^{2}-99a+3\right){x}+1047a^{2}+1119a-495$
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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.