Minimal Weierstrass equation
Minimal Weierstrass equation
Simplified equation
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\(y^2=x^3+x^2-706644x+230527296\)
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(homogenize, simplify) |
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\(y^2z=x^3+x^2z-706644xz^2+230527296z^3\)
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(dehomogenize, simplify) |
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\(y^2=x^3-57238191x+168226113330\)
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(homogenize, minimize) |
Mordell-Weil group structure
\(\Z/{4}\Z\)
Mordell-Weil generators
| $P$ | $\hat{h}(P)$ | Order |
|---|---|---|
| $(486, 1458)$ | $0$ | $4$ |
Integral points
\( \left(-972, 0\right) \), \((486,\pm 1458)\)
Invariants
| Conductor: | $N$ | = | \( 2856 \) | = | $2^{3} \cdot 3 \cdot 7 \cdot 17$ |
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| Discriminant: | $\Delta$ | = | $-421592736568502016$ | = | $-1 \cdot 2^{8} \cdot 3^{24} \cdot 7^{3} \cdot 17 $ |
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| j-invariant: | $j$ | = | \( -\frac{152435594466395827792}{1646846627220711} \) | = | $-1 \cdot 2^{4} \cdot 3^{-24} \cdot 7^{-3} \cdot 17^{-1} \cdot 23^{3} \cdot 61^{3} \cdot 1511^{3}$ |
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| Endomorphism ring: | $\mathrm{End}(E)$ | = | $\Z$ | |||
| Geometric endomorphism ring: | $\mathrm{End}(E_{\overline{\Q}})$ | = | \(\Z\) (no potential complex multiplication) |
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| Sato-Tate group: | $\mathrm{ST}(E)$ | = | $\mathrm{SU}(2)$ | |||
| Faltings height: | $h_{\mathrm{Faltings}}$ | ≈ | $2.1978601249471479700514612932$ |
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| Stable Faltings height: | $h_{\mathrm{stable}}$ | ≈ | $1.7357620045738510971066398789$ |
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| $abc$ quality: | $Q$ | ≈ | $1.0167873707918278$ | |||
| Szpiro ratio: | $\sigma_{m}$ | ≈ | $6.539623990579417$ | |||
BSD invariants
| Analytic rank: | $r_{\mathrm{an}}$ | = | $ 0$ |
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| Mordell-Weil rank: | $r$ | = | $ 0$ |
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| Regulator: | $\mathrm{Reg}(E/\Q)$ | = | $1$ |
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| Real period: | $\Omega$ | ≈ | $0.29971136951585998016249400374$ |
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| Tamagawa product: | $\prod_{p}c_p$ | = | $ 96 $ = $ 2^{2}\cdot( 2^{3} \cdot 3 )\cdot1\cdot1 $ |
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| Torsion order: | $\#E(\Q)_{\mathrm{tor}}$ | = | $4$ |
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| Special value: | $ L(E,1)$ | ≈ | $1.7982682170951598809749640224 $ |
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| Analytic order of Ш: | Ш${}_{\mathrm{an}}$ | = | $1$ (exact) |
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BSD formula
$$\begin{aligned} 1.798268217 \approx L(E,1) & = \frac{\# ะจ(E/\Q)\cdot \Omega_E \cdot \mathrm{Reg}(E/\Q) \cdot \prod_p c_p}{\#E(\Q)_{\rm tor}^2} \\ & \approx \frac{1 \cdot 0.299711 \cdot 1.000000 \cdot 96}{4^2} \\ & \approx 1.798268217\end{aligned}$$
Modular invariants
For more coefficients, see the Downloads section to the right.
| Modular degree: | 34560 |
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| $ \Gamma_0(N) $-optimal: | yes | |
| Manin constant: | 1 |
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Local data at primes of bad reduction
This elliptic curve is not semistable. There are 4 primes $p$ of bad reduction:
| $p$ | Tamagawa number | Kodaira symbol | Reduction type | Root number | $\mathrm{ord}_p(N)$ | $\mathrm{ord}_p(\Delta)$ | $\mathrm{ord}_p(\mathrm{den}(j))$ |
|---|---|---|---|---|---|---|---|
| $2$ | $4$ | $I_{1}^{*}$ | additive | -1 | 3 | 8 | 0 |
| $3$ | $24$ | $I_{24}$ | split multiplicative | -1 | 1 | 24 | 24 |
| $7$ | $1$ | $I_{3}$ | nonsplit multiplicative | 1 | 1 | 3 | 3 |
| $17$ | $1$ | $I_{1}$ | 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 |
|---|---|---|
| $2$ | 2B | 8.24.0.50 |
The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level \( 952 = 2^{3} \cdot 7 \cdot 17 \), index $48$, genus $0$, and generators
$\left(\begin{array}{rr} 841 & 836 \\ 838 & 359 \end{array}\right),\left(\begin{array}{rr} 945 & 8 \\ 944 & 9 \end{array}\right),\left(\begin{array}{rr} 1 & 0 \\ 8 & 1 \end{array}\right),\left(\begin{array}{rr} 1 & 8 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 1 & 4 \\ 4 & 17 \end{array}\right),\left(\begin{array}{rr} 603 & 598 \\ 362 & 835 \end{array}\right),\left(\begin{array}{rr} 7 & 6 \\ 946 & 947 \end{array}\right),\left(\begin{array}{rr} 684 & 1 \\ 839 & 6 \end{array}\right),\left(\begin{array}{rr} 284 & 1 \\ 919 & 6 \end{array}\right)$.
The torsion field $K:=\Q(E[952])$ is a degree-$5053612032$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/952\Z)$.
The table below list all primes $\ell$ for which the Serre invariants associated to the mod-$\ell$ Galois representation are exceptional.
| $\ell$ | Reduction type | Serre weight | Serre conductor |
|---|---|---|---|
| $2$ | additive | $2$ | \( 119 = 7 \cdot 17 \) |
| $3$ | split multiplicative | $4$ | \( 136 = 2^{3} \cdot 17 \) |
| $7$ | nonsplit multiplicative | $8$ | \( 408 = 2^{3} \cdot 3 \cdot 17 \) |
| $17$ | split multiplicative | $18$ | \( 168 = 2^{3} \cdot 3 \cdot 7 \) |
Isogenies
This curve has non-trivial cyclic isogenies of degree $d$ for $d=$
2 and 4.
Its isogeny class 2856h
consists of 4 curves linked by isogenies of
degrees dividing 4.
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 $E(\Q)_{\rm tors}$ $\cong \Z/{4}\Z$ are as follows:
| $[K:\Q]$ | $K$ | $E(K)_{\rm tors}$ | Base change curve |
|---|---|---|---|
| $2$ | \(\Q(\sqrt{-119}) \) | \(\Z/2\Z \oplus \Z/4\Z\) | not in database |
| $4$ | 4.2.30464.2 | \(\Z/8\Z\) | not in database |
| $8$ | 8.0.726978778951936.4 | \(\Z/4\Z \oplus \Z/4\Z\) | not in database |
| $8$ | 8.0.13142191046656.12 | \(\Z/2\Z \oplus \Z/8\Z\) | not in database |
| $8$ | deg 8 | \(\Z/2\Z \oplus \Z/8\Z\) | not in database |
| $8$ | 8.2.187044277248.1 | \(\Z/12\Z\) | not in database |
| $16$ | deg 16 | \(\Z/16\Z\) | not in database |
| $16$ | deg 16 | \(\Z/2\Z \oplus \Z/12\Z\) | 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 | 7 | 17 |
|---|---|---|---|---|
| Reduction type | add | split | nonsplit | split |
| $\lambda$-invariant(s) | - | 1 | 0 | 1 |
| $\mu$-invariant(s) | - | 0 | 0 | 0 |
All Iwasawa $\lambda$ and $\mu$-invariants for primes $p\ge 5$ of good reduction are zero.
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 $0$.