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
12.3-a1
12.3-a
$1$
$1$
\(\Q(\sqrt{-1487}) \)
$2$
$[0, 1]$
12.3
\( 2^{2} \cdot 3 \)
\( 2^{4} \cdot 3 \cdot 71^{12} \)
$6.41342$
$(2,a), (2,a+1), (3,a)$
$0 \le r \le 1$
$\mathsf{trivial}$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
\( 3 \)
$1$
$20.27992386$
11.94592163
\( \frac{47}{24} a + \frac{745}{24} \)
\( \bigl[1\) , \( -a + 1\) , \( a + 1\) , \( -38 a - 283\) , \( 4 a + 40325\bigr] \)
${y}^2+{x}{y}+\left(a+1\right){y}={x}^3+\left(-a+1\right){x}^2+\left(-38a-283\right){x}+4a+40325$
12.4-a1
12.4-a
$1$
$1$
\(\Q(\sqrt{-1487}) \)
$2$
$[0, 1]$
12.4
\( 2^{2} \cdot 3 \)
\( 2^{4} \cdot 3 \cdot 71^{12} \)
$6.41342$
$(2,a), (2,a+1), (3,a+2)$
$0 \le r \le 1$
$\mathsf{trivial}$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
\( 3 \)
$1$
$20.27992386$
11.94592163
\( -\frac{47}{24} a + 33 \)
\( \bigl[1\) , \( a\) , \( a\) , \( 37 a - 320\) , \( -5 a + 40330\bigr] \)
${y}^2+{x}{y}+a{y}={x}^3+a{x}^2+\left(37a-320\right){x}-5a+40330$
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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.