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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
4.1-c4 4.1-c \(\Q(\sqrt{209}) \) \( 2^{2} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $2.636252383$ 4.102951284 \( \frac{239886134047017}{32768} a + \frac{1614053766450195}{32768} \) \( \bigl[1\) , \( -1\) , \( 1\) , \( -109626655 a - 737613756\) , \( -1679777810708 a - 11302244145613\bigr] \) ${y}^2+{x}{y}+{y}={x}^{3}-{x}^{2}+\left(-109626655a-737613756\right){x}-1679777810708a-11302244145613$
4.1-d4 4.1-d \(\Q(\sqrt{209}) \) \( 2^{2} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $8.606301134$ 0.297655148 \( \frac{239886134047017}{32768} a + \frac{1614053766450195}{32768} \) \( \bigl[1\) , \( -1\) , \( 0\) , \( -950 a + 7342\) , \( 42668 a - 329756\bigr] \) ${y}^2+{x}{y}={x}^{3}-{x}^{2}+\left(-950a+7342\right){x}+42668a-329756$
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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.