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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
19.1-a1 19.1-a 5.5.65657.1 \( 19 \) $1$ $\mathsf{trivial}$ $\mathrm{SU}(2)$ $0.019623793$ $2766.708886$ 2.11887782 \( \frac{218695}{361} a^{4} - \frac{376550}{361} a^{3} - \frac{959505}{361} a^{2} + \frac{1058864}{361} a + \frac{910976}{361} \) \( \bigl[a^{4} - a^{3} - 4 a^{2} + 2 a + 2\) , \( a^{4} - a^{3} - 5 a^{2} + 4 a + 4\) , \( -a^{4} + a^{3} + 5 a^{2} - 3 a - 4\) , \( 4 a^{4} - 5 a^{3} - 17 a^{2} + 12 a + 16\) , \( 2 a^{4} - 2 a^{3} - 10 a^{2} + 6 a + 9\bigr] \) ${y}^2+\left(a^{4}-a^{3}-4a^{2}+2a+2\right){x}{y}+\left(-a^{4}+a^{3}+5a^{2}-3a-4\right){y}={x}^{3}+\left(a^{4}-a^{3}-5a^{2}+4a+4\right){x}^{2}+\left(4a^{4}-5a^{3}-17a^{2}+12a+16\right){x}+2a^{4}-2a^{3}-10a^{2}+6a+9$
171.1-a1 171.1-a 5.5.65657.1 \( 3^{2} \cdot 19 \) $1$ $\mathsf{trivial}$ $\mathrm{SU}(2)$ $0.023336836$ $2343.039936$ 4.26786965 \( \frac{218695}{361} a^{4} - \frac{376550}{361} a^{3} - \frac{959505}{361} a^{2} + \frac{1058864}{361} a + \frac{910976}{361} \) \( \bigl[-a^{4} + 2 a^{3} + 4 a^{2} - 5 a - 2\) , \( -a^{4} + 2 a^{3} + 5 a^{2} - 6 a - 4\) , \( -a^{4} + 2 a^{3} + 4 a^{2} - 6 a - 3\) , \( 4 a^{4} - 3 a^{3} - 17 a^{2} + 8 a + 16\) , \( -3 a^{4} + 6 a^{3} + 16 a^{2} - 15 a - 16\bigr] \) ${y}^2+\left(-a^{4}+2a^{3}+4a^{2}-5a-2\right){x}{y}+\left(-a^{4}+2a^{3}+4a^{2}-6a-3\right){y}={x}^{3}+\left(-a^{4}+2a^{3}+5a^{2}-6a-4\right){x}^{2}+\left(4a^{4}-3a^{3}-17a^{2}+8a+16\right){x}-3a^{4}+6a^{3}+16a^{2}-15a-16$
361.1-e1 361.1-e 5.5.65657.1 \( 19^{2} \) 0 $\mathsf{trivial}$ $\mathrm{SU}(2)$ $1$ $238.2728102$ 1.85979024 \( \frac{218695}{361} a^{4} - \frac{376550}{361} a^{3} - \frac{959505}{361} a^{2} + \frac{1058864}{361} a + \frac{910976}{361} \) \( \bigl[a^{3} - 4 a\) , \( a^{4} - 2 a^{3} - 3 a^{2} + 4 a\) , \( a^{2} - 1\) , \( 153 a^{4} - 190 a^{3} - 721 a^{2} + 477 a + 657\) , \( 104 a^{4} - 129 a^{3} - 490 a^{2} + 324 a + 445\bigr] \) ${y}^2+\left(a^{3}-4a\right){x}{y}+\left(a^{2}-1\right){y}={x}^{3}+\left(a^{4}-2a^{3}-3a^{2}+4a\right){x}^{2}+\left(153a^{4}-190a^{3}-721a^{2}+477a+657\right){x}+104a^{4}-129a^{3}-490a^{2}+324a+445$
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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.