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
1568.1-c2
1568.1-c
$4$
$4$
\(\Q(\sqrt{2}) \)
$2$
$[2, 0]$
1568.1
\( 2^{5} \cdot 7^{2} \)
\( 2^{6} \cdot 7^{4} \)
$1.59045$
$(a), (-2a+1), (2a+1)$
$1$
$\Z/2\Z\oplus\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
✓
$2$
2Cs
$1$
\( 2^{3} \)
$0.393548229$
$16.88594825$
2.349516090
\( \frac{125000}{49} \)
\( \bigl[a\) , \( 0\) , \( 0\) , \( -2\) , \( -1\bigr] \)
${y}^2+a{x}{y}={x}^{3}-2{x}-1$
1568.1-d2
1568.1-d
$4$
$4$
\(\Q(\sqrt{2}) \)
$2$
$[2, 0]$
1568.1
\( 2^{5} \cdot 7^{2} \)
\( 2^{6} \cdot 7^{4} \)
$1.59045$
$(a), (-2a+1), (2a+1)$
$1$
$\Z/2\Z\oplus\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
✓
$2$
2Cs
$1$
\( 2^{3} \)
$0.306002722$
$23.59896529$
2.553131942
\( \frac{125000}{49} \)
\( \bigl[a\) , \( -1\) , \( 0\) , \( -2\) , \( 1\bigr] \)
${y}^2+a{x}{y}={x}^{3}-{x}^{2}-2{x}+1$
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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.