Minimal Weierstrass equation
Minimal Weierstrass equation
Simplified equation
\(y^2+xy=x^3-2631210x+1642616100\) | (homogenize, simplify) |
\(y^2z+xyz=x^3-2631210xz^2+1642616100z^3\) | (dehomogenize, simplify) |
\(y^2=x^3-3410048187x+76648126906134\) | (homogenize, minimize) |
Mordell-Weil group structure
\(\Z/{7}\Z\)
Torsion generators
\( \left(930, -60\right) \)
Integral points
\( \left(120, 36390\right) \), \( \left(120, -36510\right) \), \( \left(930, -60\right) \), \( \left(930, -870\right) \), \( \left(1020, 3990\right) \), \( \left(1020, -5010\right) \)
Invariants
Conductor: | \( 42630 \) | = | $2 \cdot 3 \cdot 5 \cdot 7^{2} \cdot 29$ | comment: Conductor
sage: E.conductor().factor()
gp: ellglobalred(E)[1]
magma: Conductor(E);
oscar: conductor(E)
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Discriminant: | $-67965989490000000 $ | = | $-1 \cdot 2^{7} \cdot 3^{14} \cdot 5^{7} \cdot 7^{2} \cdot 29 $ | comment: Discriminant
sage: E.discriminant().factor()
gp: E.disc
magma: Discriminant(E);
oscar: discriminant(E)
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j-invariant: | \( -\frac{41114420704407863185009}{1387061010000000} \) | = | $-1 \cdot 2^{-7} \cdot 3^{-14} \cdot 5^{-7} \cdot 7 \cdot 13^{3} \cdot 29^{-1} \cdot 41^{3} \cdot 33851^{3}$ | 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: | $2.3220108213362482961578294112\dots$ | gp: ellheight(E)
magma: FaltingsHeight(E);
oscar: faltings_height(E)
|
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Stable Faltings height: | $1.9976924631603627453069372873\dots$ | magma: StableFaltingsHeight(E);
oscar: stable_faltings_height(E)
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BSD invariants
Analytic rank: | $0$ | sage: E.analytic_rank()
gp: ellanalyticrank(E)
magma: AnalyticRank(E);
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Regulator: | $1$ | comment: Regulator
sage: E.regulator()
G = E.gen \\ if available
magma: Regulator(E);
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Real period: | $0.32458408455058339268282514923\dots$ | 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: | $ 686 $ = $ 7\cdot( 2 \cdot 7 )\cdot7\cdot1\cdot1 $ | 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: | $7$ | 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: | $1$ ( exact) | comment: Order of Sha
sage: E.sha().an_numerical()
magma: MordellWeilShaInformation(E);
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Special value: | $ L(E,1) $ ≈ $ 4.5441771837081674975595520893 $ | comment: Special L-value
r = E.rank();
gp: [r,L1r] = ellanalyticrank(E); L1r/r!
magma: Lr1 where r,Lr1 := AnalyticRank(E: Precision:=12);
|
BSD formula
$\displaystyle 4.544177184 \approx L(E,1) = \frac{\# Ш(E/\Q)\cdot \Omega_E \cdot \mathrm{Reg}(E/\Q) \cdot \prod_p c_p}{\#E(\Q)_{\rm tor}^2} \approx \frac{1 \cdot 0.324584 \cdot 1.000000 \cdot 686}{7^2} \approx 4.544177184$
Modular invariants
Modular form 42630.2.a.dh
For more coefficients, see the Downloads section to the right.
Modular degree: | 1251264 | 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)_{-}$ |
---|---|---|---|---|---|---|---|
$2$ | $7$ | $I_{7}$ | Split multiplicative | -1 | 1 | 7 | 7 |
$3$ | $14$ | $I_{14}$ | Split multiplicative | -1 | 1 | 14 | 14 |
$5$ | $7$ | $I_{7}$ | Split multiplicative | -1 | 1 | 7 | 7 |
$7$ | $1$ | $II$ | Additive | -1 | 2 | 2 | 0 |
$29$ | $1$ | $I_{1}$ | Split multiplicative | -1 | 1 | 1 | 1 |
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 |
---|---|---|
$7$ | 7B.1.1 | 7.48.0.1 |
The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level \( 8120 = 2^{3} \cdot 5 \cdot 7 \cdot 29 \), index $96$, genus $2$, and generators
$\left(\begin{array}{rr} 8 & 7 \\ 4053 & 8114 \end{array}\right),\left(\begin{array}{rr} 1 & 14 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 6091 & 4074 \\ 0 & 4931 \end{array}\right),\left(\begin{array}{rr} 8 & 7 \\ 2023 & 8114 \end{array}\right),\left(\begin{array}{rr} 3256 & 7 \\ 3241 & 8114 \end{array}\right),\left(\begin{array}{rr} 1408 & 7 \\ 5873 & 8114 \end{array}\right),\left(\begin{array}{rr} 1 & 0 \\ 14 & 1 \end{array}\right),\left(\begin{array}{rr} 8107 & 14 \\ 8106 & 15 \end{array}\right),\left(\begin{array}{rr} 8 & 5 \\ 91 & 57 \end{array}\right)$.
The torsion field $K:=\Q(E[8120])$ is a degree-$10560562790400$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/8120\Z)$.
Isogenies
This curve has non-trivial cyclic isogenies of degree $d$ for $d=$
7.
Its isogeny class 42630.dh
consists of 2 curves linked by isogenies of
degree 7.
Twists
This elliptic curve is its own minimal quadratic twist.
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 $E(\Q)_{\rm tors}$ $\cong \Z/{7}\Z$ are as follows:
$[K:\Q]$ | $K$ | $E(K)_{\rm tors}$ | Base change curve |
---|---|---|---|
$3$ | 3.1.56840.1 | \(\Z/14\Z\) | Not in database |
$6$ | 6.0.3747711296000.1 | \(\Z/2\Z \oplus \Z/14\Z\) | Not in database |
$8$ | deg 8 | \(\Z/21\Z\) | Not in database |
$12$ | deg 12 | \(\Z/28\Z\) | 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 | split | split | split | add | ord | ord | ord | ord | ord | split | ord | ord | ss | ord | ord |
$\lambda$-invariant(s) | 3 | 3 | 1 | - | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0,0 | 0 | 0 |
$\mu$-invariant(s) | 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
All $p$-adic regulators are identically $1$ since the rank is $0$.