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
39.1-a7
39.1-a
$8$
$28$
5.5.36497.1
$5$
$[5, 0]$
39.1
\( 3 \cdot 13 \)
\( 3^{4} \cdot 13^{28} \)
$24.62485$
$(a^2-1), (a^3-3a)$
0
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
$2, 7$
2B , 7B.6.3
$4$
\( 2^{3} \cdot 7 \)
$1$
$3.253519144$
0.953702256
\( \frac{719563077579420768826778357723754883977964219744702}{1255737557015654093436832343547201} a^{4} - \frac{381278393594661046595984821496687550631447920681206}{418579185671884697812277447849067} a^{3} - \frac{876030344833436911152144359572205314535143035049625}{418579185671884697812277447849067} a^{2} + \frac{2519311520172502928352178004640753313415969058351782}{1255737557015654093436832343547201} a + \frac{1753426510580954709523077468627597477978011837927249}{1255737557015654093436832343547201} \)
\( \bigl[a^{4} - 2 a^{3} - 2 a^{2} + 4 a\) , \( -a^{4} + 2 a^{3} + 4 a^{2} - 7 a - 3\) , \( 2 a^{4} - 3 a^{3} - 7 a^{2} + 7 a + 3\) , \( -8160 a^{4} + 9948 a^{3} + 35372 a^{2} - 20898 a - 32917\) , \( -915354 a^{4} + 1590551 a^{3} + 3078970 a^{2} - 3551457 a - 1619171\bigr] \)
${y}^2+\left(a^{4}-2a^{3}-2a^{2}+4a\right){x}{y}+\left(2a^{4}-3a^{3}-7a^{2}+7a+3\right){y}={x}^{3}+\left(-a^{4}+2a^{3}+4a^{2}-7a-3\right){x}^{2}+\left(-8160a^{4}+9948a^{3}+35372a^{2}-20898a-32917\right){x}-915354a^{4}+1590551a^{3}+3078970a^{2}-3551457a-1619171$
39.1-b7
39.1-b
$8$
$28$
5.5.36497.1
$5$
$[5, 0]$
39.1
\( 3 \cdot 13 \)
\( 3^{4} \cdot 13^{28} \)
$24.62485$
$(a^2-1), (a^3-3a)$
0
$\Z/2\Z$
$\textsf{no}$
$\mathrm{SU}(2)$
✓
$2, 7$
2B , 7B.1.3
$2401$
\( 2^{3} \)
$1$
$0.059646735$
1.49927138
\( \frac{719563077579420768826778357723754883977964219744702}{1255737557015654093436832343547201} a^{4} - \frac{381278393594661046595984821496687550631447920681206}{418579185671884697812277447849067} a^{3} - \frac{876030344833436911152144359572205314535143035049625}{418579185671884697812277447849067} a^{2} + \frac{2519311520172502928352178004640753313415969058351782}{1255737557015654093436832343547201} a + \frac{1753426510580954709523077468627597477978011837927249}{1255737557015654093436832343547201} \)
\( \bigl[a^{2} - a - 1\) , \( -a^{2} + a + 2\) , \( a^{2} - a - 1\) , \( 10238 a^{4} - 25455 a^{3} - 18068 a^{2} + 59680 a - 20375\) , \( 897162 a^{4} - 2245513 a^{3} - 1558277 a^{2} + 5265005 a - 1771850\bigr] \)
${y}^2+\left(a^{2}-a-1\right){x}{y}+\left(a^{2}-a-1\right){y}={x}^{3}+\left(-a^{2}+a+2\right){x}^{2}+\left(10238a^{4}-25455a^{3}-18068a^{2}+59680a-20375\right){x}+897162a^{4}-2245513a^{3}-1558277a^{2}+5265005a-1771850$
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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.