Minimal Weierstrass equation
Minimal Weierstrass equation
Simplified equation
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\(y^2=x^3-x^2+3022296x-2155181968\)
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(homogenize, simplify) |
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\(y^2z=x^3-x^2z+3022296xz^2-2155181968z^3\)
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(dehomogenize, simplify) |
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\(y^2=x^3+244805949x-1570393236798\)
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(homogenize, minimize) |
Mordell-Weil group structure
trivial
Invariants
| Conductor: | $N$ | = | \( 21904 \) | = | $2^{4} \cdot 37^{2}$ |
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| Discriminant: | $\Delta$ | = | $-3771496095615658491904$ | = | $-1 \cdot 2^{30} \cdot 37^{8} $ |
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| j-invariant: | $j$ | = | \( \frac{212207543}{262144} \) | = | $2^{-18} \cdot 37 \cdot 179^{3}$ |
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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: | $h_{\mathrm{Faltings}}$ | ≈ | $2.8262382076753220056489220262$ |
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| Stable Faltings height: | $h_{\mathrm{stable}}$ | ≈ | $-0.27418758131410626668037387595$ |
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| $abc$ quality: | $Q$ | ≈ | $0.9847633793256833$ | |||
| Szpiro ratio: | $\sigma_{m}$ | ≈ | $5.653601380583188$ | |||
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: | $\Omega$ | ≈ | $0.074897702702231692594848855686$ |
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| Tamagawa product: | $\prod_{p}c_p$ | = | $ 6 $ = $ 2\cdot3 $ |
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| Torsion order: | $\#E(\Q)_{\mathrm{tor}}$ | = | $1$ |
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| Special value: | $ L(E,1)$ | ≈ | $7.1901794594142424891054901459 $ |
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| Analytic order of Ш: | Ш${}_{\mathrm{an}}$ | = | $16$ = $4^2$ (exact) |
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BSD formula
$$\begin{aligned} 7.190179459 \approx L(E,1) & = \frac{\# ะจ(E/\Q)\cdot \Omega_E \cdot \mathrm{Reg}(E/\Q) \cdot \prod_p c_p}{\#E(\Q)_{\rm tor}^2} \\ & \approx \frac{16 \cdot 0.074898 \cdot 1.000000 \cdot 6}{1^2} \\ & \approx 7.190179459\end{aligned}$$
Modular invariants
For more coefficients, see the Downloads section to the right.
| Modular degree: | 1534464 |
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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 2 primes $p$ of bad reduction:
| $p$ | Tamagawa number | Kodaira symbol | Reduction type | Root number | $\mathrm{ord}_p(N)$ | $\mathrm{ord}_p(\Delta)$ | $\mathrm{ord}_p(\mathrm{den}(j))$ |
|---|---|---|---|---|---|---|---|
| $2$ | $2$ | $I_{22}^{*}$ | additive | -1 | 4 | 30 | 18 |
| $37$ | $3$ | $IV^{*}$ | additive | 1 | 2 | 8 | 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 |
|---|---|---|
| $2$ | 2G | 4.4.0.3 |
| $3$ | 3B | 9.12.0.2 |
The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level \( 1332 = 2^{2} \cdot 3^{2} \cdot 37 \), index $288$, genus $6$, and generators
$\left(\begin{array}{rr} 1 & 36 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 1 & 36 \\ 12 & 433 \end{array}\right),\left(\begin{array}{rr} 1 & 0 \\ 36 & 1 \end{array}\right),\left(\begin{array}{rr} 19 & 27 \\ 657 & 1144 \end{array}\right),\left(\begin{array}{rr} 1297 & 36 \\ 1296 & 37 \end{array}\right),\left(\begin{array}{rr} 13 & 6 \\ 1282 & 1309 \end{array}\right),\left(\begin{array}{rr} 700 & 1305 \\ 579 & 499 \end{array}\right),\left(\begin{array}{rr} 1198 & 27 \\ 123 & 713 \end{array}\right),\left(\begin{array}{rr} 665 & 1296 \\ 981 & 683 \end{array}\right)$.
The torsion field $K:=\Q(E[1332])$ is a degree-$2361540096$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/1332\Z)$.
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 | $2$ | \( 1369 = 37^{2} \) |
| $37$ | additive | $506$ | \( 16 = 2^{4} \) |
Isogenies
This curve has non-trivial cyclic isogenies of degree $d$ for $d=$
3.
Its isogeny class 21904.n
consists of 2 curves linked by isogenies of
degree 3.
Twists
The minimal quadratic twist of this elliptic curve is 2738.c2, its twist by $-148$.
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 $E(\Q)_{\rm tors}$ (which is trivial) are as follows:
| $[K:\Q]$ | $K$ | $E(K)_{\rm tors}$ | Base change curve |
|---|---|---|---|
| $2$ | \(\Q(\sqrt{3}) \) | \(\Z/3\Z\) | not in database |
| $3$ | 3.1.5476.1 | \(\Z/2\Z\) | not in database |
| $6$ | 6.0.119946304.2 | \(\Z/2\Z \oplus \Z/2\Z\) | not in database |
| $6$ | 6.0.1079516736.2 | \(\Z/3\Z\) | not in database |
| $6$ | 6.2.3238550208.12 | \(\Z/6\Z\) | not in database |
| $12$ | 12.2.3596778960815104.1 | \(\Z/4\Z\) | not in database |
| $12$ | deg 12 | \(\Z/3\Z \oplus \Z/3\Z\) | not in database |
| $12$ | deg 12 | \(\Z/2\Z \oplus \Z/6\Z\) | not in database |
| $18$ | 18.6.13159351519680633235053988498989907968.1 | \(\Z/9\Z\) | not in database |
| $18$ | 18.0.1258021719181200122144096256.2 | \(\Z/2\Z \oplus \Z/6\Z\) | 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 | ord | ord | add | ord | ord | ord |
| $\lambda$-invariant(s) | - | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - | 0 | 0 | 0 |
| $\mu$-invariant(s) | - | 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 $0$.