Minimal Weierstrass equation
Minimal Weierstrass equation
Simplified equation
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\(y^2=x^3-x^2-1962x-30058\)
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(homogenize, simplify) |
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\(y^2z=x^3-x^2z-1962xz^2-30058z^3\)
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(dehomogenize, simplify) |
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\(y^2=x^3-158949x-22389102\)
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(homogenize, minimize) |
Mordell-Weil group structure
\(\Z \oplus \Z/{2}\Z\)
Mordell-Weil generators
| $P$ | $\hat{h}(P)$ | Order |
|---|---|---|
| $(-114621977014971991/4468338651170689, 15616423524782214782311230/298688925595870897251137)$ | $39.448088514201416275605107800$ | $\infty$ |
| $(-19, 0)$ | $0$ | $2$ |
Integral points
\( \left(-19, 0\right) \)
Invariants
| Conductor: | $N$ | = | \( 107648 \) | = | $2^{7} \cdot 29^{2}$ |
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| Discriminant: | $\Delta$ | = | $76137385088$ | = | $2^{7} \cdot 29^{6} $ |
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| j-invariant: | $j$ | = | \( 10976 \) | = | $2^{5} \cdot 7^{3}$ |
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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: | $h_{\mathrm{Faltings}}$ | ≈ | $0.82721817929101101419732989560$ |
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| Stable Faltings height: | $h_{\mathrm{stable}}$ | ≈ | $-1.2607655910288607632210248581$ |
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| $abc$ quality: | $Q$ | ≈ | $0.8884240490394303$ | |||
| Szpiro ratio: | $\sigma_{m}$ | ≈ | $2.965426145730404$ | |||
BSD invariants
| Analytic rank: | $r_{\mathrm{an}}$ | = | $ 1$ |
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| Mordell-Weil rank: | $r$ | = | $ 1$ |
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| Regulator: | $\mathrm{Reg}(E/\Q)$ | ≈ | $39.448088514201416275605107800$ |
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| Real period: | $\Omega$ | ≈ | $0.72149043877970602303771948722$ |
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| Tamagawa product: | $\prod_{p}c_p$ | = | $ 2 $ = $ 1\cdot2 $ |
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| Torsion order: | $\#E(\Q)_{\mathrm{tor}}$ | = | $2$ |
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| Special value: | $ L'(E,1)$ | ≈ | $14.230709345565930630377292459 $ |
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| Analytic order of Ш: | Ш${}_{\mathrm{an}}$ | ≈ | $1$ (rounded) |
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BSD formula
$$\begin{aligned} 14.230709346 \approx L'(E,1) & = \frac{\# ะจ(E/\Q)\cdot \Omega_E \cdot \mathrm{Reg}(E/\Q) \cdot \prod_p c_p}{\#E(\Q)_{\rm tor}^2} \\ & \approx \frac{1 \cdot 0.721490 \cdot 39.448089 \cdot 2}{2^2} \\ & \approx 14.230709346\end{aligned}$$
Modular invariants
Modular form 107648.2.a.bo
For more coefficients, see the Downloads section to the right.
| Modular degree: | 96768 |
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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 2 primes $p$ of bad reduction:
| $p$ | Tamagawa number | Kodaira symbol | Reduction type | Root number | $\mathrm{ord}_p(N)$ | $\mathrm{ord}_p(\Delta)$ | $\mathrm{ord}_p(\mathrm{den}(j))$ |
|---|---|---|---|---|---|---|---|
| $2$ | $1$ | $II$ | additive | 1 | 7 | 7 | 0 |
| $29$ | $2$ | $I_0^{*}$ | additive | 1 | 2 | 6 | 0 |
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 | 32.48.0.18 |
The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level \( 928 = 2^{5} \cdot 29 \), index $96$, genus $0$, and generators
$\left(\begin{array}{rr} 289 & 0 \\ 0 & 927 \end{array}\right),\left(\begin{array}{rr} 1 & 0 \\ 8 & 1 \end{array}\right),\left(\begin{array}{rr} 1 & 8 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 1 & 4 \\ 4 & 17 \end{array}\right),\left(\begin{array}{rr} 607 & 0 \\ 0 & 927 \end{array}\right),\left(\begin{array}{rr} 921 & 8 \\ 920 & 9 \end{array}\right),\left(\begin{array}{rr} 610 & 899 \\ 841 & 320 \end{array}\right),\left(\begin{array}{rr} 7 & 8 \\ 20 & 23 \end{array}\right)$.
The torsion field $K:=\Q(E[928])$ is a degree-$2793799680$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/928\Z)$.
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 | $4$ | \( 841 = 29^{2} \) |
| $29$ | additive | $422$ | \( 128 = 2^{7} \) |
Isogenies
This curve has non-trivial cyclic isogenies of degree $d$ for $d=$
2.
Its isogeny class 107648i
consists of 2 curves linked by isogenies of
degree 2.
Twists
The minimal quadratic twist of this elliptic curve is 128a2, its twist by $-232$.
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 |
|---|---|---|---|
| $2$ | \(\Q(\sqrt{2}) \) | \(\Z/2\Z \oplus \Z/2\Z\) | not in database |
| $4$ | 4.0.430592.2 | \(\Z/4\Z\) | not in database |
| $8$ | 8.4.47464824438784.13 | \(\Z/2\Z \oplus \Z/4\Z\) | not in database |
| $8$ | 8.0.2966551527424.21 | \(\Z/2\Z \oplus \Z/4\Z\) | not in database |
| $8$ | deg 8 | \(\Z/6\Z\) | not in database |
| $16$ | deg 16 | \(\Z/4\Z \oplus \Z/4\Z\) | 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 | add | ord | ord | ord | ord | ord | ord | ord | ord | add | ss | ord | ord | ord | ord |
| $\lambda$-invariant(s) | - | 1 | 1 | 1 | 1 | 1 | 3 | 1 | 1 | - | 1,1 | 1 | 1 | 1 | 1 |
| $\mu$-invariant(s) | - | 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
Note: $p$-adic regulator data only exists for primes $p\ge 5$ of good ordinary reduction.