Minimal Weierstrass equation
Minimal Weierstrass equation
Simplified equation
\(y^2+xy=x^3+x^2+20568x-662724\) | (homogenize, simplify) |
\(y^2z+xyz=x^3+x^2z+20568xz^2-662724z^3\) | (dehomogenize, simplify) |
\(y^2=x^3+26655453x-31319886114\) | (homogenize, minimize) |
Mordell-Weil group structure
\(\Z \oplus \Z \oplus \Z/{2}\Z\)
Infinite order Mordell-Weil generators and heights
$P$ | = | \(\left(347, 6784\right)\) | \(\left(186, 3012\right)\) |
$\hat{h}(P)$ | ≈ | $0.68993207879505980349395531997$ | $2.0627256526645654610705473065$ |
Torsion generators
\( \left(\frac{123}{4}, -\frac{123}{8}\right) \)
Integral points
\( \left(61, 877\right) \), \( \left(61, -938\right) \), \( \left(62, 894\right) \), \( \left(62, -956\right) \), \( \left(105, 1581\right) \), \( \left(105, -1686\right) \), \( \left(182, 2934\right) \), \( \left(182, -3116\right) \), \( \left(186, 3012\right) \), \( \left(186, -3198\right) \), \( \left(347, 6784\right) \), \( \left(347, -7131\right) \), \( \left(807, 22884\right) \), \( \left(807, -23691\right) \), \( \left(812, 23094\right) \), \( \left(812, -23906\right) \), \( \left(3130, 173764\right) \), \( \left(3130, -176894\right) \), \( \left(3372, 194334\right) \), \( \left(3372, -197706\right) \), \( \left(2348187, 3597140544\right) \), \( \left(2348187, -3599488731\right) \), \( \left(3357932, 6151618734\right) \), \( \left(3357932, -6154976666\right) \), \( \left(87561186, 819302442612\right) \), \( \left(87561186, -819390003798\right) \)
Invariants
Conductor: | \( 83490 \) | = | $2 \cdot 3 \cdot 5 \cdot 11^{2} \cdot 23$ | comment: Conductor
sage: E.conductor().factor()
gp: ellglobalred(E)[1]
magma: Conductor(E);
oscar: conductor(E)
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Discriminant: | $-751505211161100 $ | = | $-1 \cdot 2^{2} \cdot 3^{6} \cdot 5^{2} \cdot 11^{7} \cdot 23^{2} $ | comment: Discriminant
sage: E.discriminant().factor()
gp: E.disc
magma: Discriminant(E);
oscar: discriminant(E)
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j-invariant: | \( \frac{543138763679}{424205100} \) | = | $2^{-2} \cdot 3^{-6} \cdot 5^{-2} \cdot 11^{-1} \cdot 23^{-2} \cdot 41^{3} \cdot 199^{3}$ | comment: j-invariant
sage: E.j_invariant().factor()
gp: E.j
magma: jInvariant(E);
oscar: j_invariant(E)
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Endomorphism ring: | $\Z$ | |||
Geometric endomorphism ring: | \(\Z\) | (no potential complex multiplication) | sage: E.has_cm()
magma: HasComplexMultiplication(E);
| |
Sato-Tate group: | $\mathrm{SU}(2)$ | |||
Faltings height: | $1.5424273404509923827879964323\dots$ | gp: ellheight(E)
magma: FaltingsHeight(E);
oscar: faltings_height(E)
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Stable Faltings height: | $0.34347970405180711075702464332\dots$ | magma: StableFaltingsHeight(E);
oscar: stable_faltings_height(E)
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$abc$ quality: | $0.8834046140467857\dots$ | |||
Szpiro ratio: | $3.653921690577467\dots$ |
BSD invariants
Analytic rank: | $2$ | sage: E.analytic_rank()
gp: ellanalyticrank(E)
magma: AnalyticRank(E);
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Regulator: | $1.3819330647305026984669353246\dots$ | comment: Regulator
sage: E.regulator()
G = E.gen \\ if available
magma: Regulator(E);
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Real period: | $0.28156649990773082084825484498\dots$ | comment: Real Period
sage: E.period_lattice().omega()
gp: if(E.disc>0,2,1)*E.omega[1]
magma: (Discriminant(E) gt 0 select 2 else 1) * RealPeriod(E);
|
Tamagawa product: | $ 64 $ = $ 2\cdot2\cdot2\cdot2^{2}\cdot2 $ | comment: Tamagawa numbers
sage: E.tamagawa_numbers()
gp: gr=ellglobalred(E); [[gr[4][i,1],gr[5][i][4]] | i<-[1..#gr[4][,1]]]
magma: TamagawaNumbers(E);
oscar: tamagawa_numbers(E)
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Torsion order: | $2$ | comment: Torsion order
sage: E.torsion_order()
gp: elltors(E)[1]
magma: Order(TorsionSubgroup(E));
oscar: prod(torsion_structure(E)[1])
|
Analytic order of Ш: | $1$ ( rounded) | comment: Order of Sha
sage: E.sha().an_numerical()
magma: MordellWeilShaInformation(E);
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Special value: | $ L^{(2)}(E,1)/2! $ ≈ $ 6.2256968982869001363608217230 $ | comment: Special L-value
r = E.rank();
gp: [r,L1r] = ellanalyticrank(E); L1r/r!
magma: Lr1 where r,Lr1 := AnalyticRank(E: Precision:=12);
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BSD formula
$\displaystyle 6.225696898 \approx L^{(2)}(E,1)/2! \overset{?}{=} \frac{\# Ш(E/\Q)\cdot \Omega_E \cdot \mathrm{Reg}(E/\Q) \cdot \prod_p c_p}{\#E(\Q)_{\rm tor}^2} \approx \frac{1 \cdot 0.281566 \cdot 1.381933 \cdot 64}{2^2} \approx 6.225696898$
Modular invariants
Modular form 83490.2.a.h
For more coefficients, see the Downloads section to the right.
Modular degree: | 645120 | comment: Modular degree
sage: E.modular_degree()
gp: ellmoddegree(E)
magma: ModularDegree(E);
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$ \Gamma_0(N) $-optimal: | no | |
Manin constant: | 1 | comment: Manin constant
magma: ManinConstant(E);
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Local data
This elliptic curve is not semistable. There are 5 primes of bad reduction:
prime | Tamagawa number | Kodaira symbol | Reduction type | Root number | ord($N$) | ord($\Delta$) | ord$(j)_{-}$ |
---|---|---|---|---|---|---|---|
$2$ | $2$ | $I_{2}$ | Non-split multiplicative | 1 | 1 | 2 | 2 |
$3$ | $2$ | $I_{6}$ | Non-split multiplicative | 1 | 1 | 6 | 6 |
$5$ | $2$ | $I_{2}$ | Split multiplicative | -1 | 1 | 2 | 2 |
$11$ | $4$ | $I_{1}^{*}$ | Additive | -1 | 2 | 7 | 1 |
$23$ | $2$ | $I_{2}$ | Split multiplicative | -1 | 1 | 2 | 2 |
Galois representations
The $\ell$-adic Galois representation has maximal image for all primes $\ell$ except those listed in the table below.
prime $\ell$ | mod-$\ell$ image | $\ell$-adic image |
---|---|---|
$2$ | 2B | 2.3.0.1 |
The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level \( 15180 = 2^{2} \cdot 3 \cdot 5 \cdot 11 \cdot 23 \), index $12$, genus $0$, and generators
$\left(\begin{array}{rr} 1 & 0 \\ 4 & 1 \end{array}\right),\left(\begin{array}{rr} 3 & 4 \\ 8 & 11 \end{array}\right),\left(\begin{array}{rr} 3037 & 4 \\ 6074 & 9 \end{array}\right),\left(\begin{array}{rr} 1 & 2 \\ 2 & 5 \end{array}\right),\left(\begin{array}{rr} 1 & 4 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 9662 & 1 \\ 2759 & 0 \end{array}\right),\left(\begin{array}{rr} 10121 & 4 \\ 5062 & 9 \end{array}\right),\left(\begin{array}{rr} 3797 & 11386 \\ 11384 & 3795 \end{array}\right),\left(\begin{array}{rr} 3961 & 4 \\ 7922 & 9 \end{array}\right),\left(\begin{array}{rr} 15177 & 4 \\ 15176 & 5 \end{array}\right)$.
The torsion field $K:=\Q(E[15180])$ is a degree-$650026156032000$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/15180\Z)$.
Isogenies
This curve has non-trivial cyclic isogenies of degree $d$ for $d=$
2.
Its isogeny class 83490.h
consists of 2 curves linked by isogenies of
degree 2.
Twists
The minimal quadratic twist of this elliptic curve is 7590.w2, its twist by $-11$.
Growth of torsion in number fields
The number fields $K$ of degree less than 24 such that $E(K)_{\rm tors}$ is strictly larger than $E(\Q)_{\rm tors}$ $\cong \Z/{2}\Z$ are as follows:
$[K:\Q]$ | $K$ | $E(K)_{\rm tors}$ | Base change curve |
---|---|---|---|
$2$ | \(\Q(\sqrt{-11}) \) | \(\Z/2\Z \oplus \Z/2\Z\) | Not in database |
$4$ | 4.2.20948400.3 | \(\Z/4\Z\) | Not in database |
$8$ | deg 8 | \(\Z/2\Z \oplus \Z/4\Z\) | Not in database |
$8$ | 8.0.53099090969760000.34 | \(\Z/2\Z \oplus \Z/4\Z\) | Not in database |
$8$ | deg 8 | \(\Z/6\Z\) | Not in database |
$16$ | deg 16 | \(\Z/8\Z\) | Not in database |
$16$ | deg 16 | \(\Z/2\Z \oplus \Z/6\Z\) | Not in database |
We only show fields where the torsion growth is primitive. For fields not in the database, click on the degree shown to reveal the defining polynomial.
Iwasawa invariants
$p$ | 2 | 3 | 5 | 7 | 11 | 13 | 17 | 19 | 23 | 29 | 31 | 37 | 41 | 43 | 47 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Reduction type | nonsplit | nonsplit | split | ord | add | ord | ord | ord | split | ord | ss | ord | ss | ord | ord |
$\lambda$-invariant(s) | 2 | 2 | 3 | 2 | - | 2 | 2 | 2 | 3 | 2 | 2,2 | 2 | 2,2 | 2 | 2 |
$\mu$-invariant(s) | 1 | 0 | 0 | 0 | - | 0 | 0 | 0 | 0 | 0 | 0,0 | 0 | 0,0 | 0 | 0 |
An entry - indicates that the invariants are not computed because the reduction is additive.
$p$-adic regulators
$p$-adic regulators are not yet computed for curves that are not $\Gamma_0$-optimal.