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Label Class Base field Conductor norm Rank Torsion CM Regulator Period Leading coeff j-invariant Weierstrass coefficients Weierstrass equation
15.1-a8 15.1-a \(\Q(\sqrt{105}) \) \( 3 \cdot 5 \) $1$ $\Z/2\Z$ $0.172294519$ $10.19195692$ 1.370958724 \( \frac{1114544804970241}{405} \) \( \bigl[a\) , \( 0\) , \( 0\) , \( -1350352143 a - 6243319882\) , \( 61135112671028 a + 282656688470200\bigr] \) ${y}^2+a{x}{y}={x}^{3}+\left(-1350352143a-6243319882\right){x}+61135112671028a+282656688470200$
15.1-b8 15.1-b \(\Q(\sqrt{105}) \) \( 3 \cdot 5 \) $0$ $\Z/2\Z$ $1$ $0.490422220$ 3.063059717 \( \frac{1114544804970241}{405} \) \( \bigl[1\) , \( a + 1\) , \( a\) , \( -1416973 a - 6551334\) , \( -2081450248 a - 9623533989\bigr] \) ${y}^2+{x}{y}+a{y}={x}^{3}+\left(a+1\right){x}^{2}+\left(-1416973a-6551334\right){x}-2081450248a-9623533989$
15.1-c8 15.1-c \(\Q(\sqrt{105}) \) \( 3 \cdot 5 \) $1$ $\Z/2\Z$ $2.617916422$ $0.490422220$ 1.002354292 \( \frac{1114544804970241}{405} \) \( \bigl[1\) , \( 1\) , \( 1\) , \( -2160\) , \( -39540\bigr] \) ${y}^2+{x}{y}+{y}={x}^{3}+{x}^{2}-2160{x}-39540$
15.1-d8 15.1-d \(\Q(\sqrt{105}) \) \( 3 \cdot 5 \) $0$ $\Z/2\Z$ $1$ $10.19195692$ 0.994633150 \( \frac{1114544804970241}{405} \) \( \bigl[a\) , \( -a\) , \( 0\) , \( -200885 a - 928790\) , \( 110782080 a + 512198220\bigr] \) ${y}^2+a{x}{y}={x}^{3}-a{x}^{2}+\left(-200885a-928790\right){x}+110782080a+512198220$
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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.