Minimal Weierstrass equation
Minimal Weierstrass equation
Simplified equation
\(y^2+xy+y=x^3+18484x-436982\) | (homogenize, simplify) |
\(y^2z+xyz+yz^2=x^3+18484xz^2-436982z^3\) | (dehomogenize, simplify) |
\(y^2=x^3+23955885x-20459688210\) | (homogenize, minimize) |
Mordell-Weil group structure
\(\Z\)
Infinite order Mordell-Weil generator and height
$P$ | = | \(\left(\frac{12907}{324}, \frac{3394619}{5832}\right)\) |
$\hat{h}(P)$ | ≈ | $7.4392826860055291818424577352$ |
Integral points
None
Invariants
Conductor: | \( 42050 \) | = | $2 \cdot 5^{2} \cdot 29^{2}$ | comment: Conductor
sage: E.conductor().factor()
gp: ellglobalred(E)[1]
magma: Conductor(E);
oscar: conductor(E)
|
Discriminant: | $-487279264563200 $ | = | $-1 \cdot 2^{15} \cdot 5^{2} \cdot 29^{6} $ | comment: Discriminant
sage: E.discriminant().factor()
gp: E.disc
magma: Discriminant(E);
oscar: discriminant(E)
|
j-invariant: | \( \frac{46969655}{32768} \) | = | $2^{-15} \cdot 5 \cdot 211^{3}$ | comment: j-invariant
sage: E.j_invariant().factor()
gp: E.j
magma: jInvariant(E);
oscar: j_invariant(E)
|
Endomorphism ring: | $\Z$ | |||
Geometric endomorphism ring: | \(\Z\) | (no potential complex multiplication) | sage: E.has_cm()
magma: HasComplexMultiplication(E);
| |
Sato-Tate group: | $\mathrm{SU}(2)$ | |||
Faltings height: | $1.5068544631834103265354332546\dots$ | gp: ellheight(E)
magma: FaltingsHeight(E);
oscar: faltings_height(E)
|
||
Stable Faltings height: | $-0.44503310388217674948966265045\dots$ | magma: StableFaltingsHeight(E);
oscar: stable_faltings_height(E)
|
||
$abc$ quality: | $1.0629647337743247\dots$ | |||
Szpiro ratio: | $3.859223275091776\dots$ |
BSD invariants
Analytic rank: | $1$ | sage: E.analytic_rank()
gp: ellanalyticrank(E)
magma: AnalyticRank(E);
|
Regulator: | $7.4392826860055291818424577352\dots$ | comment: Regulator
sage: E.regulator()
G = E.gen \\ if available
magma: Regulator(E);
|
Real period: | $0.29612564048798228635377256704\dots$ | comment: Real Period
sage: E.period_lattice().omega()
gp: if(E.disc>0,2,1)*E.omega[1]
magma: (Discriminant(E) gt 0 select 2 else 1) * RealPeriod(E);
|
Tamagawa product: | $ 2 $ = $ 1\cdot1\cdot2 $ | comment: Tamagawa numbers
sage: E.tamagawa_numbers()
gp: gr=ellglobalred(E); [[gr[4][i,1],gr[5][i][4]] | i<-[1..#gr[4][,1]]]
magma: TamagawaNumbers(E);
oscar: tamagawa_numbers(E)
|
Torsion order: | $1$ | comment: Torsion order
sage: E.torsion_order()
gp: elltors(E)[1]
magma: Order(TorsionSubgroup(E));
oscar: prod(torsion_structure(E)[1])
|
Analytic order of Ш: | $1$ ( rounded) | comment: Order of Sha
sage: E.sha().an_numerical()
magma: MordellWeilShaInformation(E);
|
Special value: | $ L'(E,1) $ ≈ $ 4.4059247003290890929215732951 $ | comment: Special L-value
r = E.rank();
gp: [r,L1r] = ellanalyticrank(E); L1r/r!
magma: Lr1 where r,Lr1 := AnalyticRank(E: Precision:=12);
|
BSD formula
$\displaystyle 4.405924700 \approx L'(E,1) = \frac{\# Ш(E/\Q)\cdot \Omega_E \cdot \mathrm{Reg}(E/\Q) \cdot \prod_p c_p}{\#E(\Q)_{\rm tor}^2} \approx \frac{1 \cdot 0.296126 \cdot 7.439283 \cdot 2}{1^2} \approx 4.405924700$
Modular invariants
Modular form 42050.2.a.m
For more coefficients, see the Downloads section to the right.
Modular degree: | 151200 | comment: Modular degree
sage: E.modular_degree()
gp: ellmoddegree(E)
magma: ModularDegree(E);
|
$ \Gamma_0(N) $-optimal: | no | |
Manin constant: | 1 | comment: Manin constant
magma: ManinConstant(E);
|
Local data
This elliptic curve is not semistable. There are 3 primes of bad reduction:
prime | Tamagawa number | Kodaira symbol | Reduction type | Root number | ord($N$) | ord($\Delta$) | ord$(j)_{-}$ |
---|---|---|---|---|---|---|---|
$2$ | $1$ | $I_{15}$ | Non-split multiplicative | 1 | 1 | 15 | 15 |
$5$ | $1$ | $II$ | Additive | 1 | 2 | 2 | 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 |
---|---|---|
$2$ | 2G | 8.2.0.1 |
$3$ | 3B | 3.4.0.1 |
$5$ | 5B.4.1 | 5.12.0.1 |
The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level \( 3480 = 2^{3} \cdot 3 \cdot 5 \cdot 29 \), index $384$, genus $9$, and generators
$\left(\begin{array}{rr} 1 & 0 \\ 2640 & 1 \end{array}\right),\left(\begin{array}{rr} 2321 & 1160 \\ 2320 & 1161 \end{array}\right),\left(\begin{array}{rr} 1 & 0 \\ 870 & 1 \end{array}\right),\left(\begin{array}{rr} 1161 & 290 \\ 2320 & 697 \end{array}\right),\left(\begin{array}{rr} 839 & 0 \\ 0 & 3479 \end{array}\right),\left(\begin{array}{rr} 1 & 0 \\ 1740 & 1 \end{array}\right),\left(\begin{array}{rr} 871 & 2610 \\ 2175 & 2611 \end{array}\right),\left(\begin{array}{rr} 1 & 2436 \\ 1740 & 1 \end{array}\right),\left(\begin{array}{rr} 1 & 522 \\ 2610 & 1741 \end{array}\right),\left(\begin{array}{rr} 1 & 1392 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 3046 & 1305 \\ 3045 & 1 \end{array}\right),\left(\begin{array}{rr} 1741 & 2610 \\ 3045 & 2611 \end{array}\right),\left(\begin{array}{rr} 841 & 2640 \\ 840 & 841 \end{array}\right),\left(\begin{array}{rr} 2321 & 2610 \\ 2320 & 1 \end{array}\right)$.
The torsion field $K:=\Q(E[3480])$ is a degree-$62860492800$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/3480\Z)$.
Isogenies
This curve has non-trivial cyclic isogenies of degree $d$ for $d=$
3, 5 and 15.
Its isogeny class 42050f
consists of 4 curves linked by isogenies of
degrees dividing 15.
Twists
The minimal quadratic twist of this elliptic curve is 50b2, its twist by $29$.
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 |
---|---|---|---|
$2$ | \(\Q(\sqrt{-435}) \) | \(\Z/3\Z\) | Not in database |
$2$ | \(\Q(\sqrt{29}) \) | \(\Z/5\Z\) | Not in database |
$3$ | 3.1.200.1 | \(\Z/2\Z\) | Not in database |
$4$ | \(\Q(\sqrt{-15}, \sqrt{29})\) | \(\Z/15\Z\) | Not in database |
$6$ | 6.0.320000.1 | \(\Z/2\Z \oplus \Z/2\Z\) | Not in database |
$6$ | 6.2.55561190625.5 | \(\Z/3\Z\) | Not in database |
$6$ | 6.0.131700600000.11 | \(\Z/6\Z\) | Not in database |
$6$ | 6.2.975560000.2 | \(\Z/10\Z\) | Not in database |
$12$ | deg 12 | \(\Z/4\Z\) | 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 |
$12$ | deg 12 | \(\Z/2\Z \oplus \Z/10\Z\) | Not in database |
$12$ | deg 12 | \(\Z/15\Z\) | Not in database |
$12$ | deg 12 | \(\Z/30\Z\) | Not in database |
$18$ | 18.0.13828206983490740523972337875000000000000.2 | \(\Z/9\Z\) | Not in database |
$18$ | 18.2.44962924703724401439528000000000000000.1 | \(\Z/6\Z\) | Not in database |
$20$ | 20.0.1959070718382489867508411407470703125.2 | \(\Z/5\Z\) | 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 | add | ord | ord | ord | ord | ord | ord | add | ord | ord | ord | ord | ord |
$\lambda$-invariant(s) | 4 | 5 | - | 1 | 1 | 1 | 1 | 1 | 1 | - | 1 | 1 | 1 | 1 | 1 |
$\mu$-invariant(s) | 0 | 1 | - | 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.