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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
2100.1-n9 2100.1-n \(\Q(\sqrt{21}) \) \( 2^{2} \cdot 3 \cdot 5^{2} \cdot 7 \) $1$ $\Z/2\Z\oplus\Z/4\Z$ $\mathrm{SU}(2)$ $2.723410405$ $0.153837332$ 6.582603280 \( \frac{1169975873419524361}{108425318400} \) \( \bigl[1\) , \( 0\) , \( 1\) , \( -21953\) , \( -1253644\bigr] \) ${y}^2+{x}{y}+{y}={x}^{3}-21953{x}-1253644$
2100.1-bl9 2100.1-bl \(\Q(\sqrt{21}) \) \( 2^{2} \cdot 3 \cdot 5^{2} \cdot 7 \) 0 $\Z/2\Z\oplus\Z/6\Z$ $\mathrm{SU}(2)$ $1$ $1.021919351$ 1.784008679 \( \frac{1169975873419524361}{108425318400} \) \( \bigl[a\) , \( 1\) , \( a + 1\) , \( 109762 a - 307336\) , \( -29977688 a + 83686795\bigr] \) ${y}^2+a{x}{y}+\left(a+1\right){y}={x}^{3}+{x}^{2}+\left(109762a-307336\right){x}-29977688a+83686795$
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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.