Minimal Weierstrass equation
Minimal Weierstrass equation
Simplified equation
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\(y^2=x^3-x^2-545x+39585\)
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(homogenize, simplify) |
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\(y^2z=x^3-x^2z-545xz^2+39585z^3\)
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(dehomogenize, simplify) |
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\(y^2=x^3-44172x+28724976\)
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(homogenize, minimize) |
Mordell-Weil group structure
\(\Z \oplus \Z/{2}\Z\)
Mordell-Weil generators
| $P$ | $\hat{h}(P)$ | Order |
|---|---|---|
| \( \left(-\frac{599}{16}, \frac{5005}{64}\right) \) | $6.9239719607894607007992387180$ | $\infty$ |
| \( \left(-39, 0\right) \) | $0$ | $2$ |
| $P$ | $\hat{h}(P)$ | Order |
|---|---|---|
| \([-2396:5005:64]\) | $6.9239719607894607007992387180$ | $\infty$ |
| \([-39:0:1]\) | $0$ | $2$ |
| $P$ | $\hat{h}(P)$ | Order |
|---|---|---|
| \( \left(-\frac{5439}{16}, \frac{135135}{64}\right) \) | $6.9239719607894607007992387180$ | $\infty$ |
| \( \left(-354, 0\right) \) | $0$ | $2$ |
Integral points
\( \left(-39, 0\right) \)
\([-39:0:1]\)
\( \left(-39, 0\right) \)
Invariants
| Conductor: | $N$ | = | \( 39360 \) | = | $2^{6} \cdot 3 \cdot 5 \cdot 41$ |
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| Minimal Discriminant: | $\Delta$ | = | $-660351221760$ | = | $-1 \cdot 2^{30} \cdot 3 \cdot 5 \cdot 41 $ |
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| j-invariant: | $j$ | = | \( -\frac{68417929}{2519040} \) | = | $-1 \cdot 2^{-12} \cdot 3^{-1} \cdot 5^{-1} \cdot 41^{-1} \cdot 409^{3}$ |
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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: | $h_{\mathrm{Faltings}}$ | ≈ | $0.94822289100545414239701550968$ |
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| Stable Faltings height: | $h_{\mathrm{stable}}$ | ≈ | $-0.091497879834463821728832672507$ |
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| $abc$ quality: | $Q$ | ≈ | $0.9965127199539703$ | |||
| Szpiro ratio: | $\sigma_{m}$ | ≈ | $3.2783266975189287$ | |||
| Intrinsic torsion order: | $\#E(\mathbb Q)_\text{tors}^\text{is}$ | = | $2$ | |||
BSD invariants
| Analytic rank: | $r_{\mathrm{an}}$ | = | $ 1$ |
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| Mordell-Weil rank: | $r$ | = | $ 1$ |
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| Regulator: | $\mathrm{Reg}(E/\Q)$ | ≈ | $6.9239719607894607007992387180$ |
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| Real period: | $\Omega$ | ≈ | $0.75690039314149603948137363809$ |
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| Tamagawa product: | $\prod_{p}c_p$ | = | $ 4 $ = $ 2^{2}\cdot1\cdot1\cdot1 $ |
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| Torsion order: | $\#E(\Q)_{\mathrm{tor}}$ | = | $2$ |
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| Special value: | $ L'(E,1)$ | ≈ | $5.2407570992222380046247887746 $ |
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| Analytic order of Ш: | Ш${}_{\mathrm{an}}$ | ≈ | $1$ (rounded) |
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BSD formula
$$\begin{aligned} 5.240757099 \approx L'(E,1) & = \frac{\# ะจ(E/\Q)\cdot \Omega_E \cdot \mathrm{Reg}(E/\Q) \cdot \prod_p c_p}{\#E(\Q)_{\rm tor}^2} \\ & \approx \frac{1 \cdot 0.756900 \cdot 6.923972 \cdot 4}{2^2} \\ & \approx 5.240757099\end{aligned}$$
Modular invariants
For more coefficients, see the Downloads section to the right.
| Modular degree: | 36864 |
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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 | $\mathrm{ord}_p(N)$ | $\mathrm{ord}_p(\Delta)$ | $\mathrm{ord}_p(\mathrm{den}(j))$ |
|---|---|---|---|---|---|---|---|
| $2$ | $4$ | $I_{20}^{*}$ | additive | 1 | 6 | 30 | 12 |
| $3$ | $1$ | $I_{1}$ | nonsplit multiplicative | 1 | 1 | 1 | 1 |
| $5$ | $1$ | $I_{1}$ | split multiplicative | -1 | 1 | 1 | 1 |
| $41$ | $1$ | $I_{1}$ | 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 | 8.12.0.6 | $12$ |
The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level \( 4920 = 2^{3} \cdot 3 \cdot 5 \cdot 41 \), index $48$, genus $0$, and generators
$\left(\begin{array}{rr} 1849 & 1848 \\ 4318 & 1855 \end{array}\right),\left(\begin{array}{rr} 1 & 0 \\ 8 & 1 \end{array}\right),\left(\begin{array}{rr} 988 & 1 \\ 1991 & 6 \end{array}\right),\left(\begin{array}{rr} 1 & 8 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 1 & 4 \\ 4 & 17 \end{array}\right),\left(\begin{array}{rr} 4913 & 8 \\ 4912 & 9 \end{array}\right),\left(\begin{array}{rr} 7 & 6 \\ 4914 & 4915 \end{array}\right),\left(\begin{array}{rr} 1688 & 3 \\ 2285 & 2 \end{array}\right),\left(\begin{array}{rr} 1837 & 1842 \\ 3070 & 613 \end{array}\right),\left(\begin{array}{rr} 1648 & 3 \\ 1645 & 2 \end{array}\right)$.
The torsion field $K:=\Q(E[4920])$ is a degree-$2031353856000$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/4920\Z)$.
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 | $2$ | \( 615 = 3 \cdot 5 \cdot 41 \) |
| $3$ | nonsplit multiplicative | $4$ | \( 13120 = 2^{6} \cdot 5 \cdot 41 \) |
| $5$ | split multiplicative | $6$ | \( 7872 = 2^{6} \cdot 3 \cdot 41 \) |
| $41$ | split multiplicative | $42$ | \( 960 = 2^{6} \cdot 3 \cdot 5 \) |
Isogenies
This curve has non-trivial cyclic isogenies of degree $d$ for $d=$
2 and 4.
Its isogeny class 39360.bh
consists of 4 curves linked by isogenies of
degrees dividing 4.
Twists
The minimal quadratic twist of this elliptic curve is 1230.c4, its twist by $8$.
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 |
|---|---|---|---|
| $2$ | \(\Q(\sqrt{-615}) \) | \(\Z/2\Z \oplus \Z/2\Z\) | not in database |
| $2$ | \(\Q(\sqrt{10}) \) | \(\Z/4\Z\) | not in database |
| $2$ | \(\Q(\sqrt{-246}) \) | \(\Z/4\Z\) | not in database |
| $4$ | \(\Q(\sqrt{10}, \sqrt{-246})\) | \(\Z/2\Z \oplus \Z/4\Z\) | not in database |
| $4$ | \(\Q(\sqrt{10 +16 \sqrt{10}})\) | \(\Z/8\Z\) | not in database |
| $8$ | deg 8 | \(\Z/2\Z \oplus \Z/4\Z\) | not in database |
| $8$ | deg 8 | \(\Z/8\Z\) | not in database |
| $8$ | 8.0.14648745024000000.53 | \(\Z/2\Z \oplus \Z/8\Z\) | 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 | \(\Z/2\Z \oplus \Z/8\Z\) | not in database |
| $16$ | deg 16 | \(\Z/16\Z\) | not in database |
| $16$ | deg 16 | \(\Z/2\Z \oplus \Z/6\Z\) | not in database |
| $16$ | deg 16 | \(\Z/12\Z\) | not in database |
| $16$ | deg 16 | \(\Z/12\Z\) | 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 | add | nonsplit | split | ss | ord | ord | ord | ss | ss | ord | ord | ord | split | ord | ord |
| $\lambda$-invariant(s) | - | 7 | 2 | 1,1 | 1 | 1 | 1 | 3,1 | 1,1 | 1 | 1 | 1 | 2 | 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
Note: $p$-adic regulator data only exists for primes $p\ge 5$ of good ordinary reduction.