Minimal Weierstrass equation
Minimal Weierstrass equation
Simplified equation
\(y^2=x^3-19995759084x-1088315748908080\) | (homogenize, simplify) |
\(y^2z=x^3-19995759084xz^2-1088315748908080z^3\) | (dehomogenize, simplify) |
\(y^2=x^3-19995759084x-1088315748908080\) | (homogenize, minimize) |
Mordell-Weil group structure
\(\Z \oplus \Z/{2}\Z \oplus \Z/{2}\Z\)
Infinite order Mordell-Weil generator and height
$P$ | = | \(\left(-\frac{542878680787938243537137634444542976591408087142215751}{6649697691213034765202864743687363298382736000900}, \frac{177816822502755456827019228095751257387902347528886082483317012143259208180557}{17147580595297407288530730111967438192652418184563409863774001576879973000}\right)\) |
$\hat{h}(P)$ | ≈ | $117.12932057063449408403268356$ |
Torsion generators
\( \left(-81662, 0\right) \), \( \left(-81620, 0\right) \)
Integral points
\( \left(-81662, 0\right) \), \( \left(-81620, 0\right) \), \( \left(163282, 0\right) \)
Invariants
Conductor: | \( 479808 \) | = | $2^{6} \cdot 3^{2} \cdot 7^{2} \cdot 17$ | comment: Conductor
sage: E.conductor().factor()
gp: ellglobalred(E)[1]
magma: Conductor(E);
oscar: conductor(E)
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Discriminant: | $101563308174635755930976256 $ | = | $2^{16} \cdot 3^{18} \cdot 7^{12} \cdot 17^{2} $ | comment: Discriminant
sage: E.discriminant().factor()
gp: E.disc
magma: Discriminant(E);
oscar: discriminant(E)
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j-invariant: | \( \frac{157304700372188331121828}{18069292138401} \) | = | $2^{2} \cdot 3^{-12} \cdot 7^{-6} \cdot 17^{-2} \cdot 73^{3} \cdot 465841^{3}$ | 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);
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Sato-Tate group: | $\mathrm{SU}(2)$ | |||
Faltings height: | $4.4132685243688047777189924049\dots$ | gp: ellheight(E)
magma: FaltingsHeight(E);
oscar: faltings_height(E)
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Stable Faltings height: | $1.9668110647604995335790505861\dots$ | magma: StableFaltingsHeight(E);
oscar: stable_faltings_height(E)
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$abc$ quality: | $1.0420651643816399\dots$ | |||
Szpiro ratio: | $6.32742657869283\dots$ |
BSD invariants
Analytic rank: | $1$ | sage: E.analytic_rank()
gp: ellanalyticrank(E)
magma: AnalyticRank(E);
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Regulator: | $117.12932057063449408403268356\dots$ | comment: Regulator
sage: E.regulator()
G = E.gen \\ if available
magma: Regulator(E);
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Real period: | $0.012695946503467008515101179915\dots$ | 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);
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Tamagawa product: | $ 128 $ = $ 2^{2}\cdot2^{2}\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: | $4$ | comment: Torsion order
sage: E.torsion_order()
gp: elltors(E)[1]
magma: Order(TorsionSubgroup(E));
oscar: prod(torsion_structure(E)[1])
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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'(E,1) $ ≈ $ 11.896540703617706877854808315 $ | 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
$\displaystyle 11.896540704 \approx L'(E,1) = \frac{\# Ш(E/\Q)\cdot \Omega_E \cdot \mathrm{Reg}(E/\Q) \cdot \prod_p c_p}{\#E(\Q)_{\rm tor}^2} \approx \frac{1 \cdot 0.012696 \cdot 117.129321 \cdot 128}{4^2} \approx 11.896540704$
Modular invariants
Modular form 479808.2.a.ok
For more coefficients, see the Downloads section to the right.
Modular degree: | 424673280 | comment: Modular degree
sage: E.modular_degree()
gp: ellmoddegree(E)
magma: ModularDegree(E);
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$ \Gamma_0(N) $-optimal: | not computed* (one of 3 curves in this isogeny class which might be optimal) | |
Manin constant: | 1 (conditional*) | comment: Manin constant
magma: ManinConstant(E);
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Local data
This elliptic curve is not semistable. There are 4 primes of bad reduction:
prime | Tamagawa number | Kodaira symbol | Reduction type | Root number | ord($N$) | ord($\Delta$) | ord$(j)_{-}$ |
---|---|---|---|---|---|---|---|
$2$ | $4$ | $I_{6}^{*}$ | Additive | -1 | 6 | 16 | 0 |
$3$ | $4$ | $I_{12}^{*}$ | Additive | -1 | 2 | 18 | 12 |
$7$ | $4$ | $I_{6}^{*}$ | Additive | -1 | 2 | 12 | 6 |
$17$ | $2$ | $I_{2}$ | 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 |
---|---|---|
$2$ | 2Cs | 8.12.0.3 |
The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level \( 2856 = 2^{3} \cdot 3 \cdot 7 \cdot 17 \), index $48$, genus $0$, and generators
$\left(\begin{array}{rr} 1 & 0 \\ 4 & 1 \end{array}\right),\left(\begin{array}{rr} 1 & 4 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 451 & 954 \\ 2238 & 1903 \end{array}\right),\left(\begin{array}{rr} 1427 & 1902 \\ 0 & 2855 \end{array}\right),\left(\begin{array}{rr} 2853 & 4 \\ 2852 & 5 \end{array}\right),\left(\begin{array}{rr} 1903 & 0 \\ 0 & 2855 \end{array}\right),\left(\begin{array}{rr} 677 & 1902 \\ 1770 & 953 \end{array}\right),\left(\begin{array}{rr} 713 & 1902 \\ 0 & 2855 \end{array}\right)$.
The torsion field $K:=\Q(E[2856])$ is a degree-$242573377536$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/2856\Z)$.
Isogenies
This curve has non-trivial cyclic isogenies of degree $d$ for $d=$
2.
Its isogeny class 479808.ok
consists of 4 curves linked by isogenies of
degrees dividing 4.
Twists
The minimal quadratic twist of this elliptic curve is 2856.c3, its twist by $-168$.
Iwasawa invariants
No Iwasawa invariant data is available for this curve.
$p$-adic regulators
$p$-adic regulators are not yet computed for curves that are not $\Gamma_0$-optimal.