Minimal Weierstrass equation
Minimal Weierstrass equation
Simplified equation
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\(y^2+xy+y=x^3-23241x-1364734\)
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(homogenize, simplify) |
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\(y^2z+xyz+yz^2=x^3-23241xz^2-1364734z^3\)
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(dehomogenize, simplify) |
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\(y^2=x^3-30119715x-63582658722\)
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(homogenize, minimize) |
Mordell-Weil group structure
\(\Z \oplus \Z/{2}\Z\)
Mordell-Weil generators
| $P$ | $\hat{h}(P)$ | Order |
|---|---|---|
| \( \left(\frac{4506}{25}, \frac{58256}{125}\right) \) | $3.9879782538792070589209640983$ | $\infty$ |
| \( \left(-\frac{345}{4}, \frac{341}{8}\right) \) | $0$ | $2$ |
| $P$ | $\hat{h}(P)$ | Order |
|---|---|---|
| \([22530:58256:125]\) | $3.9879782538792070589209640983$ | $\infty$ |
| \([-690:341:8]\) | $0$ | $2$ |
| $P$ | $\hat{h}(P)$ | Order |
|---|---|---|
| \( \left(\frac{162291}{25}, \frac{15030036}{125}\right) \) | $3.9879782538792070589209640983$ | $\infty$ |
| \( \left(-3102, 0\right) \) | $0$ | $2$ |
Integral points
None
Invariants
| Conductor: | $N$ | = | \( 30926 \) | = | $2 \cdot 7 \cdot 47^{2}$ |
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| Minimal Discriminant: | $\Delta$ | = | $1056363102242$ | = | $2 \cdot 7^{2} \cdot 47^{6} $ |
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| j-invariant: | $j$ | = | \( \frac{128787625}{98} \) | = | $2^{-1} \cdot 5^{3} \cdot 7^{-2} \cdot 101^{3}$ |
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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: | $h_{\mathrm{Faltings}}$ | ≈ | $1.2395624926100040595960124528$ |
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| Stable Faltings height: | $h_{\mathrm{stable}}$ | ≈ | $-0.68551130824502523381446288209$ |
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| $abc$ quality: | $Q$ | ≈ | $0.9676277689392396$ | |||
| Szpiro ratio: | $\sigma_{m}$ | ≈ | $4.040345927330757$ | |||
| Intrinsic torsion order: | $\#E(\mathbb Q)_\text{tors}^\text{is}$ | = | $1$ | |||
BSD invariants
| Analytic rank: | $r_{\mathrm{an}}$ | = | $ 1$ |
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| Mordell-Weil rank: | $r$ | = | $ 1$ |
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| Regulator: | $\mathrm{Reg}(E/\Q)$ | ≈ | $3.9879782538792070589209640983$ |
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| Real period: | $\Omega$ | ≈ | $0.38668553681363927901693718853$ |
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| Tamagawa product: | $\prod_{p}c_p$ | = | $ 8 $ = $ 1\cdot2\cdot2^{2} $ |
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| Torsion order: | $\#E(\Q)_{\mathrm{tor}}$ | = | $2$ |
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| Special value: | $ L'(E,1)$ | ≈ | $3.0841870238048020241106774161 $ |
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| Analytic order of Ш: | Ш${}_{\mathrm{an}}$ | ≈ | $1$ (rounded) |
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BSD formula
$$\begin{aligned} 3.084187024 \approx L'(E,1) & = \frac{\# Ш(E/\Q)\cdot \Omega_E \cdot \mathrm{Reg}(E/\Q) \cdot \prod_p c_p}{\#E(\Q)_{\rm tor}^2} \\ & \approx \frac{1 \cdot 0.386686 \cdot 3.987978 \cdot 8}{2^2} \\ & \approx 3.084187024\end{aligned}$$
Modular invariants
For more coefficients, see the Downloads section to the right.
| Modular degree: | 66240 |
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| $ \Gamma_0(N) $-optimal: | no | |
| Manin constant: | 1 |
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Local data at primes of bad reduction
This elliptic curve is not semistable. There are 3 primes $p$ of bad reduction:
| $p$ | Tamagawa number | Kodaira symbol | Reduction type | Root number | $\mathrm{ord}_p(N)$ | $\mathrm{ord}_p(\Delta)$ | $\mathrm{ord}_p(\mathrm{den}(j))$ |
|---|---|---|---|---|---|---|---|
| $2$ | $1$ | $I_{1}$ | nonsplit multiplicative | 1 | 1 | 1 | 1 |
| $7$ | $2$ | $I_{2}$ | split multiplicative | -1 | 1 | 2 | 2 |
| $47$ | $4$ | $I_0^{*}$ | 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 | $\ell$-adic index |
|---|---|---|---|
| $2$ | 2B | 8.6.0.6 | $6$ |
| $3$ | 3B | 9.12.0.1 | $12$ |
The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level \( 23688 = 2^{3} \cdot 3^{2} \cdot 7 \cdot 47 \), index $864$, genus $21$, and generators
$\left(\begin{array}{rr} 1 & 36 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 1 & 0 \\ 36 & 1 \end{array}\right),\left(\begin{array}{rr} 15652 & 15651 \\ 4089 & 6346 \end{array}\right),\left(\begin{array}{rr} 11087 & 0 \\ 0 & 23687 \end{array}\right),\left(\begin{array}{rr} 17767 & 5076 \\ 15886 & 3385 \end{array}\right),\left(\begin{array}{rr} 19 & 36 \\ 3240 & 6139 \end{array}\right),\left(\begin{array}{rr} 23653 & 36 \\ 23652 & 37 \end{array}\right),\left(\begin{array}{rr} 18425 & 5076 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 12409 & 5076 \\ 20586 & 21433 \end{array}\right),\left(\begin{array}{rr} 1 & 18 \\ 14 & 253 \end{array}\right)$.
The torsion field $K:=\Q(E[23688])$ is a degree-$66519506092032$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/23688\Z)$.
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 |
|---|---|---|---|
| $2$ | nonsplit multiplicative | $4$ | \( 2209 = 47^{2} \) |
| $7$ | split multiplicative | $8$ | \( 4418 = 2 \cdot 47^{2} \) |
| $47$ | additive | $1106$ | \( 14 = 2 \cdot 7 \) |
Isogenies
This curve has non-trivial cyclic isogenies of degree $d$ for $d=$
2, 3, 6, 9 and 18.
Its isogeny class 30926f
consists of 6 curves linked by isogenies of
degrees dividing 18.
Twists
The minimal quadratic twist of this elliptic curve is 14a6, its twist by $-47$.
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 |
| $2$ | \(\Q(\sqrt{-47}) \) | \(\Z/6\Z\) | 2.0.47.1-196.5-a5 |
| $4$ | \(\Q(\sqrt{-94 +94 \sqrt{-7}})\) | \(\Z/4\Z\) | not in database |
| $4$ | \(\Q(\sqrt{2}, \sqrt{-47})\) | \(\Z/2\Z \oplus \Z/6\Z\) | not in database |
| $6$ | 6.2.107688537936.1 | \(\Z/6\Z\) | not in database |
| $6$ | 6.0.249279023.2 | \(\Z/18\Z\) | not in database |
| $8$ | 8.4.1002876411314176.18 | \(\Z/2\Z \oplus \Z/4\Z\) | not in database |
| $8$ | 8.0.767827252412416.43 | \(\Z/2\Z \oplus \Z/4\Z\) | not in database |
| $8$ | 8.0.11997300818944.7 | \(\Z/12\Z\) | not in database |
| $12$ | deg 12 | \(\Z/3\Z \oplus \Z/6\Z\) | not in database |
| $12$ | 12.0.4829996336023869696.1 | \(\Z/18\Z\) | not in database |
| $12$ | deg 12 | \(\Z/2\Z \oplus \Z/6\Z\) | not in database |
| $12$ | deg 12 | \(\Z/2\Z \oplus \Z/18\Z\) | not in database |
| $16$ | deg 16 | \(\Z/8\Z\) | not in database |
| $16$ | deg 16 | \(\Z/2\Z \oplus \Z/12\Z\) | 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 | 5 | 7 | 11 | 13 | 17 | 19 | 23 | 29 | 31 | 37 | 41 | 43 | 47 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Reduction type | nonsplit | ord | ss | split | ss | ord | ord | ord | ss | ord | ord | ord | ord | ord | add |
| $\lambda$-invariant(s) | 8 | 5 | 1,1 | 2 | 3,1 | 1 | 1 | 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 | 0 | 0 | 0 | - |
An entry - indicates that the invariants are not computed because the reduction is additive.
$p$-adic regulators
$p$-adic regulators are not yet computed for curves that are not $\Gamma_0$-optimal.