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
1083.2-b4
1083.2-b
$6$
$8$
\(\Q(\sqrt{-3}) \)
$2$
$[0, 1]$
1083.2
\( 3 \cdot 19^{2} \)
\( 3^{2} \cdot 19^{2} \)
$0.88788$
$(-2a+1), (-5a+3), (-5a+2)$
0
$\Z/4\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
✓
✓
$2$
2B
$1$
\( 2 \)
$1$
$6.529377996$
0.942434535
\( \frac{389017}{57} \)
\( \bigl[1\) , \( 0\) , \( 1\) , \( -2\) , \( -1\bigr] \)
${y}^2+{x}{y}+{y}={x}^{3}-2{x}-1$
61731.2-b3
61731.2-b
$6$
$8$
\(\Q(\sqrt{-3}) \)
$2$
$[0, 1]$
61731.2
\( 3^{2} \cdot 19^{3} \)
\( 3^{8} \cdot 19^{8} \)
$2.43964$
$(-2a+1), (-5a+3), (-5a+2)$
0
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
$2$
2B
$1$
\( 2^{2} \)
$1$
$0.864837242$
0.998628029
\( \frac{389017}{57} \)
\( \bigl[1\) , \( a\) , \( a + 1\) , \( -73 a + 95\) , \( -104 a - 168\bigr] \)
${y}^2+{x}{y}+\left(a+1\right){y}={x}^{3}+a{x}^{2}+\left(-73a+95\right){x}-104a-168$
61731.3-b3
61731.3-b
$6$
$8$
\(\Q(\sqrt{-3}) \)
$2$
$[0, 1]$
61731.3
\( 3^{2} \cdot 19^{3} \)
\( 3^{8} \cdot 19^{8} \)
$2.43964$
$(-2a+1), (-5a+3), (-5a+2)$
0
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
$2$
2B
$1$
\( 2^{2} \)
$1$
$0.864837242$
0.998628029
\( \frac{389017}{57} \)
\( \bigl[a + 1\) , \( -a - 1\) , \( a\) , \( 22 a - 95\) , \( 103 a - 271\bigr] \)
${y}^2+\left(a+1\right){x}{y}+a{y}={x}^{3}+\left(-a-1\right){x}^{2}+\left(22a-95\right){x}+103a-271$
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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.