Label
Class
Class size
Class degree
Base field
Field degree
Field signature
Conductor
Conductor norm
Discriminant norm
Root analytic conductor
Bad primes
Rank
Torsion
CM
CM
Sato-Tate
$\Q$-curve
Base change
Semistable
Potentially good
Nonmax $\ell$
mod-$\ell$ images
$Ш_{\textrm{an}}$
Tamagawa
Regulator
Period
Leading coeff
j-invariant
Weierstrass coefficients
Weierstrass equation
72.1-a5
72.1-a
$6$
$8$
\(\Q(\sqrt{19}) \)
$2$
$[2, 0]$
72.1
\( 2^{3} \cdot 3^{2} \)
\( 2^{8} \cdot 3^{2} \)
$2.26923$
$(-3a+13), (-a-4), (-a+4)$
0
$\Z/4\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
✓
$2$
2B
$1$
\( 2 \)
$1$
$37.20447790$
0.533455787
\( \frac{28756228}{3} \)
\( \bigl[a + 1\) , \( a\) , \( a + 1\) , \( 213269 a - 929588\) , \( -112025240 a + 488306750\bigr] \)
${y}^2+\left(a+1\right){x}{y}+\left(a+1\right){y}={x}^{3}+a{x}^{2}+\left(213269a-929588\right){x}-112025240a+488306750$
72.1-j5
72.1-j
$6$
$8$
\(\Q(\sqrt{19}) \)
$2$
$[2, 0]$
72.1
\( 2^{3} \cdot 3^{2} \)
\( 2^{8} \cdot 3^{2} \)
$2.26923$
$(-3a+13), (-a-4), (-a+4)$
$1$
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
✓
$2$
2B
$1$
\( 2^{2} \)
$3.125190167$
$5.683508517$
4.074892574
\( \frac{28756228}{3} \)
\( \bigl[a + 1\) , \( a - 1\) , \( a + 1\) , \( 213268 a - 929591\) , \( 111735445 a - 487043477\bigr] \)
${y}^2+\left(a+1\right){x}{y}+\left(a+1\right){y}={x}^{3}+\left(a-1\right){x}^{2}+\left(213268a-929591\right){x}+111735445a-487043477$
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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.