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
254.2-a3
254.2-a
$4$
$6$
\(\Q(\sqrt{2}) \)
$2$
$[2, 0]$
254.2
\( 2 \cdot 127 \)
\( 2 \cdot 127^{6} \)
$1.00900$
$(a), (8a-1)$
0
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
$2, 3$
2B , 3B.1.2
$1$
\( 2 \cdot 3 \)
$1$
$3.116749225$
1.652905884
\( -\frac{49516122983763575}{8391745829378} a + \frac{46201138692841517}{4195872914689} \)
\( \bigl[1\) , \( -a - 1\) , \( 1\) , \( -15 a - 61\) , \( -5 a - 107\bigr] \)
${y}^2+{x}{y}+{y}={x}^{3}+\left(-a-1\right){x}^{2}+\left(-15a-61\right){x}-5a-107$
2032.2-a3
2032.2-a
$4$
$6$
\(\Q(\sqrt{2}) \)
$2$
$[2, 0]$
2032.2
\( 2^{4} \cdot 127 \)
\( 2^{13} \cdot 127^{6} \)
$1.69693$
$(a), (8a-1)$
0
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
$2, 3$
2B , 3B
$1$
\( 2^{3} \)
$1$
$2.910230739$
2.057843890
\( -\frac{49516122983763575}{8391745829378} a + \frac{46201138692841517}{4195872914689} \)
\( \bigl[a\) , \( -a + 1\) , \( 0\) , \( -63 a - 244\) , \( 284 a + 977\bigr] \)
${y}^2+a{x}{y}={x}^{3}+\left(-a+1\right){x}^{2}+\left(-63a-244\right){x}+284a+977$
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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.