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
64.5-a2
64.5-a
$4$
$4$
\(\Q(\sqrt{17}) \)
$2$
$[2, 0]$
64.5
\( 2^{6} \)
\( 2^{13} \)
$1.04210$
$(-a+2), (-a-1)$
0
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
$2$
2B
$1$
\( 2 \)
$1$
$7.156385278$
0.867839188
\( -\frac{1592342311}{2} a + \frac{4078872403}{2} \)
\( \bigl[a + 1\) , \( -a + 1\) , \( 0\) , \( -16 a - 25\) , \( -4 a - 9\bigr] \)
${y}^2+\left(a+1\right){x}{y}={x}^{3}+\left(-a+1\right){x}^{2}+\left(-16a-25\right){x}-4a-9$
64.5-b2
64.5-b
$4$
$4$
\(\Q(\sqrt{17}) \)
$2$
$[2, 0]$
64.5
\( 2^{6} \)
\( 2^{13} \)
$1.04210$
$(-a+2), (-a-1)$
0
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
$2$
2B
$1$
\( 2^{2} \)
$1$
$7.009864600$
1.700141892
\( -\frac{1592342311}{2} a + \frac{4078872403}{2} \)
\( \bigl[a + 1\) , \( 0\) , \( 0\) , \( 38 a - 95\) , \( 180 a - 461\bigr] \)
${y}^2+\left(a+1\right){x}{y}={x}^{3}+\left(38a-95\right){x}+180a-461$
128.5-a2
128.5-a
$4$
$4$
\(\Q(\sqrt{17}) \)
$2$
$[2, 0]$
128.5
\( 2^{7} \)
\( 2^{7} \)
$1.23927$
$(-a+2), (-a-1)$
0
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
$2$
2B
$1$
\( 1 \)
$1$
$35.29470114$
2.140055600
\( -\frac{1592342311}{2} a + \frac{4078872403}{2} \)
\( \bigl[a + 1\) , \( -a - 1\) , \( a + 1\) , \( -a - 9\) , \( -2 a + 3\bigr] \)
${y}^2+\left(a+1\right){x}{y}+\left(a+1\right){y}={x}^{3}+\left(-a-1\right){x}^{2}+\left(-a-9\right){x}-2a+3$
128.5-d2
128.5-d
$4$
$4$
\(\Q(\sqrt{17}) \)
$2$
$[2, 0]$
128.5
\( 2^{7} \)
\( 2^{7} \)
$1.23927$
$(-a+2), (-a-1)$
$1$
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
$2$
2B
$1$
\( 1 \)
$0.327876043$
$34.57207326$
1.374613658
\( -\frac{1592342311}{2} a + \frac{4078872403}{2} \)
\( \bigl[a + 1\) , \( 0\) , \( a + 1\) , \( -85 a - 133\) , \( -137 a - 214\bigr] \)
${y}^2+\left(a+1\right){x}{y}+\left(a+1\right){y}={x}^{3}+\left(-85a-133\right){x}-137a-214$
512.2-e2
512.2-e
$4$
$4$
\(\Q(\sqrt{17}) \)
$2$
$[2, 0]$
512.2
\( 2^{9} \)
\( 2^{25} \)
$1.75259$
$(-a+2), (-a-1)$
0
$\Z/4\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
$2$
2B
$1$
\( 2^{3} \)
$1$
$12.47856126$
1.513247827
\( -\frac{1592342311}{2} a + \frac{4078872403}{2} \)
\( \bigl[0\) , \( -a - 1\) , \( 0\) , \( -104 a - 168\) , \( 192 a + 304\bigr] \)
${y}^2={x}^{3}+\left(-a-1\right){x}^{2}+\left(-104a-168\right){x}+192a+304$
512.2-f2
512.2-f
$4$
$4$
\(\Q(\sqrt{17}) \)
$2$
$[2, 0]$
512.2
\( 2^{9} \)
\( 2^{25} \)
$1.75259$
$(-a+2), (-a-1)$
$1$
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
$2$
2B
$1$
\( 2^{3} \)
$0.235830817$
$12.22307372$
2.796510914
\( -\frac{1592342311}{2} a + \frac{4078872403}{2} \)
\( \bigl[0\) , \( -a\) , \( 0\) , \( 90 a - 235\) , \( -633 a + 1626\bigr] \)
${y}^2={x}^{3}-a{x}^{2}+\left(90a-235\right){x}-633a+1626$
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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.