Elliptic Curve Search Results

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Base field	Conductor norm	Isogenous curves	Base change curves	\(\Q\)-curves	CM curves
Torsion order	Isogeny degree	Torsion structure	j-invariant

Results (displaying both matches)

Label	Base field	Conductor norm	Conductor label	Isogeny class	Weierstrass coefficients
21.1-a3	4.4.9909.1	21	21.1	21.1-a	\( \bigl[1\) , \( a\) , \( a^{2} - 2\) , \( -13750 a^{3} + 16605 a^{2} + 62452 a - 34158\) , \( 1313123 a^{3} - 1585648 a^{2} - 5964098 a + 3262387\bigr] \)
21.1-d3	4.4.9909.1	21	21.1	21.1-d	\( \bigl[a^{3} - a^{2} - 3 a + 2\) , \( a^{3} - a^{2} - 5 a\) , \( a + 1\) , \( -84 a^{3} + 146 a^{2} + 299 a - 174\) , \( -188 a^{3} + 858 a^{2} + 1498 a - 961\bigr] \)