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
220.2-c2
220.2-c
$2$
$5$
\(\Q(\sqrt{-55}) \)
$2$
$[0, 1]$
220.2
\( 2^{2} \cdot 5 \cdot 11 \)
\( 2^{10} \cdot 5^{22} \cdot 11^{2} \)
$2.55226$
$(2,a), (2,a+1), (5,a+2), (11,a+5)$
$1$
$\mathsf{trivial}$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
✓
✓
$5$
5B.1.4
$1$
\( 2^{2} \cdot 5 \)
$0.138104932$
$1.376145879$
2.050134267
\( \frac{109902239}{1100000} \)
\( \bigl[1\) , \( 0\) , \( 1\) , \( 249\) , \( -6102\bigr] \)
${y}^2+{x}{y}+{y}={x}^3+249{x}-6102$
220.2-f2
220.2-f
$2$
$5$
\(\Q(\sqrt{-55}) \)
$2$
$[0, 1]$
220.2
\( 2^{2} \cdot 5 \cdot 11 \)
\( 2^{10} \cdot 5^{10} \cdot 11^{2} \)
$2.55226$
$(2,a), (2,a+1), (5,a+2), (11,a+5)$
$1$
$\Z/5\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
✓
✓
$5$
5B.1.1
$1$
\( 2^{2} \cdot 5^{3} \)
$0.632146461$
$1.376145879$
9.384061113
\( \frac{109902239}{1100000} \)
\( \bigl[1\) , \( 1\) , \( 1\) , \( 10\) , \( -45\bigr] \)
${y}^2+{x}{y}+{y}={x}^3+{x}^2+10{x}-45$
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Pari/GP
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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.