Minimal Weierstrass equation
Minimal Weierstrass equation
Simplified equation
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\(y^2+xy+y=x^3-x^2+207x+2657\)
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(homogenize, simplify) |
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\(y^2z+xyz+yz^2=x^3-x^2z+207xz^2+2657z^3\)
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(dehomogenize, simplify) |
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\(y^2=x^3+3317x+173382\)
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(homogenize, minimize) |
Mordell-Weil group structure
\(\Z/{2}\Z\)
Mordell-Weil generators
| $P$ | $\hat{h}(P)$ | Order |
|---|---|---|
| \( \left(-9, 4\right) \) | $0$ | $2$ |
| $P$ | $\hat{h}(P)$ | Order |
|---|---|---|
| \([-9:4:1]\) | $0$ | $2$ |
| $P$ | $\hat{h}(P)$ | Order |
|---|---|---|
| \( \left(-37, 0\right) \) | $0$ | $2$ |
Integral points
\( \left(-9, 4\right) \)
\([-9:4:1]\)
\( \left(-37, 0\right) \)
Invariants
| Conductor: | $N$ | = | \( 40310 \) | = | $2 \cdot 5 \cdot 29 \cdot 139$ |
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| Minimal Discriminant: | $\Delta$ | = | $-3740768000$ | = | $-1 \cdot 2^{8} \cdot 5^{3} \cdot 29^{2} \cdot 139 $ |
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| j-invariant: | $j$ | = | \( \frac{985371912351}{3740768000} \) | = | $2^{-8} \cdot 3^{3} \cdot 5^{-3} \cdot 29^{-2} \cdot 31^{3} \cdot 107^{3} \cdot 139^{-1}$ |
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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: | $h_{\mathrm{Faltings}}$ | ≈ | $0.51967995454270512357377560808$ |
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| Stable Faltings height: | $h_{\mathrm{stable}}$ | ≈ | $0.51967995454270512357377560808$ |
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| $abc$ quality: | $Q$ | ≈ | $0.8710215498767643$ | |||
| Szpiro ratio: | $\sigma_{m}$ | ≈ | $2.766022528698099$ | |||
| Intrinsic torsion order: | $\#E(\mathbb Q)_\text{tors}^\text{is}$ | = | $$ | |||
BSD invariants
| Analytic rank: | $r_{\mathrm{an}}$ | = | $ 0$ |
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| Mordell-Weil rank: | $r$ | = | $ 0$ |
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| Regulator: | $\mathrm{Reg}(E/\Q)$ | = | $1$ |
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| Real period: | $\Omega$ | ≈ | $0.99565385425610233392487482447$ |
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| Tamagawa product: | $\prod_{p}c_p$ | = | $ 16 $ = $ 2^{3}\cdot1\cdot2\cdot1 $ |
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| Torsion order: | $\#E(\Q)_{\mathrm{tor}}$ | = | $2$ |
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| Special value: | $ L(E,1)$ | ≈ | $3.9826154170244093356994992979 $ |
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| Analytic order of Ш: | Ш${}_{\mathrm{an}}$ | = | $1$ (exact) |
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BSD formula
$$\begin{aligned} 3.982615417 \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 0.995654 \cdot 1.000000 \cdot 16}{2^2} \\ & \approx 3.982615417\end{aligned}$$
Modular invariants
For more coefficients, see the Downloads section to the right.
| Modular degree: | 27648 |
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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 semistable. There are 4 primes $p$ of bad reduction:
| $p$ | Tamagawa number | Kodaira symbol | Reduction type | Root number | $\mathrm{ord}_p(N)$ | $\mathrm{ord}_p(\Delta)$ | $\mathrm{ord}_p(\mathrm{den}(j))$ |
|---|---|---|---|---|---|---|---|
| $2$ | $8$ | $I_{8}$ | split multiplicative | -1 | 1 | 8 | 8 |
| $5$ | $1$ | $I_{3}$ | nonsplit multiplicative | 1 | 1 | 3 | 3 |
| $29$ | $2$ | $I_{2}$ | split multiplicative | -1 | 1 | 2 | 2 |
| $139$ | $1$ | $I_{1}$ | 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 | $\ell$-adic index |
|---|---|---|---|
| $2$ | 2B | 2.3.0.1 | $3$ |
The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level \( 80620 = 2^{2} \cdot 5 \cdot 29 \cdot 139 \), index $12$, genus $0$, and generators
$\left(\begin{array}{rr} 20157 & 60466 \\ 60464 & 20155 \end{array}\right),\left(\begin{array}{rr} 1 & 2 \\ 2 & 5 \end{array}\right),\left(\begin{array}{rr} 1 & 4 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 33642 & 1 \\ 63799 & 0 \end{array}\right),\left(\begin{array}{rr} 19461 & 4 \\ 38922 & 9 \end{array}\right),\left(\begin{array}{rr} 80617 & 4 \\ 80616 & 5 \end{array}\right),\left(\begin{array}{rr} 1 & 0 \\ 4 & 1 \end{array}\right),\left(\begin{array}{rr} 48374 & 1 \\ 16123 & 0 \end{array}\right),\left(\begin{array}{rr} 3 & 4 \\ 8 & 11 \end{array}\right)$.
The torsion field $K:=\Q(E[80620])$ is a degree-$970660928176128000$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/80620\Z)$.
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 |
|---|---|---|---|
| $2$ | split multiplicative | $4$ | \( 695 = 5 \cdot 139 \) |
| $3$ | good | $2$ | \( 8062 = 2 \cdot 29 \cdot 139 \) |
| $5$ | nonsplit multiplicative | $6$ | \( 8062 = 2 \cdot 29 \cdot 139 \) |
| $29$ | split multiplicative | $30$ | \( 1390 = 2 \cdot 5 \cdot 139 \) |
| $139$ | split multiplicative | $140$ | \( 290 = 2 \cdot 5 \cdot 29 \) |
Isogenies
This curve has non-trivial cyclic isogenies of degree $d$ for $d=$
2.
Its isogeny class 40310u
consists of 2 curves linked by isogenies of
degree 2.
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 $E(\Q)_{\rm tors}$ $\cong \Z/{2}\Z$ are as follows:
| $[K:\Q]$ | $K$ | $E(K)_{\rm tors}$ | Base change curve |
|---|---|---|---|
| $2$ | \(\Q(\sqrt{-695}) \) | \(\Z/2\Z \oplus \Z/2\Z\) | not in database |
| $4$ | 4.2.584495.1 | \(\Z/4\Z\) | not in database |
| $8$ | deg 8 | \(\Z/2\Z \oplus \Z/4\Z\) | not in database |
| $8$ | deg 8 | \(\Z/2\Z \oplus \Z/4\Z\) | 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 | 5 | 29 | 139 |
|---|---|---|---|---|
| Reduction type | split | nonsplit | split | split |
| $\lambda$-invariant(s) | 1 | 0 | 1 | 1 |
| $\mu$-invariant(s) | 0 | 0 | 0 | 0 |
All Iwasawa $\lambda$ and $\mu$-invariants for primes $p\ge 3$ of good reduction are zero.
$p$-adic regulators
All $p$-adic regulators are identically $1$ since the rank is $0$.