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-a1	4.4.9909.1	21	21.1	21.1-a	\( \bigl[a^{3} - 5 a - 2\) , \( a^{2} - 3\) , \( a\) , \( 72 a^{3} + 44 a^{2} - 417 a - 462\) , \( 786 a^{3} + 381 a^{2} - 4500 a - 4563\bigr] \)
21.1-d1	4.4.9909.1	21	21.1	21.1-d	\( \bigl[a^{2} - a - 2\) , \( a^{3} - 5 a - 3\) , \( a^{3} - a^{2} - 3 a + 2\) , \( 87 a^{3} - 17 a^{2} - 418 a - 327\) , \( -740 a^{3} - 97 a^{2} + 3864 a + 3503\bigr] \)