Properties

Label 4830.z4
Conductor $4830$
Discriminant $-6.605\times 10^{18}$
j-invariant \( \frac{2652277923951208297919}{6605028468326400000} \)
CM no
Rank $1$
Torsion structure \(\Z/{4}\Z\)

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Show commands: Magma / Pari/GP / SageMath

Minimal Weierstrass equation

sage: E = EllipticCurve([1, 1, 1, 288380, 108455045])
 
gp: E = ellinit([1, 1, 1, 288380, 108455045])
 
magma: E := EllipticCurve([1, 1, 1, 288380, 108455045]);
 

\(y^2+xy+y=x^3+x^2+288380x+108455045\)  Toggle raw display

Mordell-Weil group structure

$\Z\times \Z/{4}\Z$

Infinite order Mordell-Weil generator and height

sage: E.gens()
 
magma: Generators(E);
 

$P$ =  \(\left(-227, 5713\right)\)  Toggle raw display
$\hat{h}(P)$ ≈  $0.30513583331935287027626877844$

Torsion generators

sage: E.torsion_subgroup().gens()
 
gp: elltors(E)
 
magma: TorsionSubgroup(E);
 

\( \left(445, 17809\right) \)  Toggle raw display

Integral points

sage: E.integral_points()
 
magma: IntegralPoints(E);
 

\( \left(-291, 145\right) \), \( \left(-227, 5713\right) \), \( \left(-227, -5487\right) \), \( \left(-107, 8793\right) \), \( \left(-107, -8687\right) \), \( \left(123, 12013\right) \), \( \left(123, -12137\right) \), \( \left(193, 12993\right) \), \( \left(193, -13187\right) \), \( \left(445, 17809\right) \), \( \left(445, -18255\right) \), \( \left(2013, 93073\right) \), \( \left(2013, -95087\right) \), \( \left(2653, 138513\right) \), \( \left(2653, -141167\right) \), \( \left(8173, 736513\right) \), \( \left(8173, -744687\right) \), \( \left(14613, 1760473\right) \), \( \left(14613, -1775087\right) \), \( \left(128923, 46227063\right) \), \( \left(128923, -46355987\right) \)  Toggle raw display

Invariants

sage: E.conductor().factor()
 
gp: ellglobalred(E)[1]
 
magma: Conductor(E);
 
Conductor: \( 4830 \)  =  $2 \cdot 3 \cdot 5 \cdot 7 \cdot 23$
sage: E.discriminant().factor()
 
gp: E.disc
 
magma: Discriminant(E);
 
Discriminant: $-6605028468326400000 $  =  $-1 \cdot 2^{20} \cdot 3 \cdot 5^{5} \cdot 7^{4} \cdot 23^{4} $
sage: E.j_invariant().factor()
 
gp: E.j
 
magma: jInvariant(E);
 
j-invariant: \( \frac{2652277923951208297919}{6605028468326400000} \)  =  $2^{-20} \cdot 3^{-1} \cdot 5^{-5} \cdot 7^{-4} \cdot 23^{-4} \cdot 13842239^{3}$
Endomorphism ring: $\Z$
Geometric endomorphism ring: \(\Z\) (no potential complex multiplication)
Sato-Tate group: $\mathrm{SU}(2)$
Faltings height: $2.2950315527408435029849394571\dots$
Stable Faltings height: $2.2950315527408435029849394571\dots$

BSD invariants

sage: E.rank()
 
magma: Rank(E);
 
Analytic rank: $1$
sage: E.regulator()
 
magma: Regulator(E);
 
Regulator: $0.30513583331935287027626877844\dots$
sage: E.period_lattice().omega()
 
gp: E.omega[1]
 
magma: RealPeriod(E);
 
Real period: $0.16575857733038252567834586680\dots$
sage: E.tamagawa_numbers()
 
gp: gr=ellglobalred(E); [[gr[4][i,1],gr[5][i][4]] | i<-[1..#gr[4][,1]]]
 
magma: TamagawaNumbers(E);
 
Tamagawa product: $ 1600 $  = $ ( 2^{2} \cdot 5 )\cdot1\cdot5\cdot2^{2}\cdot2^{2} $
sage: E.torsion_order()
 
gp: elltors(E)[1]
 
magma: Order(TorsionSubgroup(E));
 
Torsion order: $4$
sage: E.sha().an_numerical()
 
magma: MordellWeilShaInformation(E);
 
Analytic order of Ш: $1$ (exact)
sage: r = E.rank();
 
sage: E.lseries().dokchitser().derivative(1,r)/r.factorial()
 
gp: ar = ellanalyticrank(E);
 
gp: ar[2]/factorial(ar[1])
 
magma: Lr1 where r,Lr1 := AnalyticRank(E: Precision:=12);
 
Special value: $ L'(E,1) $ ≈ $ 5.0578881623536665624874473577151360968 $

Modular invariants

Modular form   4830.2.a.z

sage: E.q_eigenform(20)
 
gp: xy = elltaniyama(E);
 
gp: x*deriv(xy[1])/(2*xy[2]+E.a1*xy[1]+E.a3)
 
magma: ModularForm(E);
 

\( q + q^{2} - q^{3} + q^{4} + q^{5} - q^{6} + q^{7} + q^{8} + q^{9} + q^{10} - q^{12} - 6q^{13} + q^{14} - q^{15} + q^{16} - 6q^{17} + q^{18} + 4q^{19} + O(q^{20}) \)  Toggle raw display

For more coefficients, see the Downloads section to the right.

sage: E.modular_degree()
 
magma: ModularDegree(E);
 
Modular degree: 153600
$ \Gamma_0(N) $-optimal: yes
Manin constant: 1

Local data

This elliptic curve is semistable. There are 5 primes of bad reduction:

sage: E.local_data()
 
gp: ellglobalred(E)[5]
 
magma: [LocalInformation(E,p) : p in BadPrimes(E)];
 
prime Tamagawa number Kodaira symbol Reduction type Root number ord($N$) ord($\Delta$) ord$(j)_{-}$
$2$ $20$ $I_{20}$ Split multiplicative -1 1 20 20
$3$ $1$ $I_{1}$ Non-split multiplicative 1 1 1 1
$5$ $5$ $I_{5}$ Split multiplicative -1 1 5 5
$7$ $4$ $I_{4}$ Split multiplicative -1 1 4 4
$23$ $4$ $I_{4}$ Split multiplicative -1 1 4 4

Galois representations

sage: rho = E.galois_representation();
 
sage: [rho.image_type(p) for p in rho.non_surjective()]
 
magma: [GaloisRepresentation(E,p): p in PrimesUpTo(20)];
 

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 4.12.0.7

$p$-adic regulators

sage: [E.padic_regulator(p) for p in primes(5,20) if E.conductor().valuation(p)<2]
 

Note: $p$-adic regulator data only exists for primes $p\ge 5$ of good ordinary reduction.

Iwasawa invariants

$p$ 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47
Reduction type split nonsplit split split ss ordinary ordinary ordinary split ordinary ss ordinary ordinary ordinary ordinary
$\lambda$-invariant(s) 4 1 2 2 1,1 1 1 1 2 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

Isogenies

This curve has non-trivial cyclic isogenies of degree $d$ for $d=$ 2 and 4.
Its isogeny class 4830.z consists of 4 curves linked by isogenies of degrees dividing 4.

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 $E(\Q)_{\rm tors}$ $\cong \Z/{4}\Z$ are as follows:

$[K:\Q]$ $K$ $E(K)_{\rm tors}$ Base change curve
$2$ \(\Q(\sqrt{-15}) \) \(\Z/2\Z \times \Z/4\Z\) Not in database
$4$ 4.2.507840.2 \(\Z/8\Z\) Not in database
$8$ 8.0.2916000000.2 \(\Z/4\Z \times \Z/4\Z\) Not in database
$8$ 8.0.13056261696000000.97 \(\Z/2\Z \times \Z/8\Z\) Not in database
$8$ 8.0.58027829760000.2 \(\Z/2\Z \times \Z/8\Z\) Not in database
$8$ Deg 8 \(\Z/12\Z\) Not in database
$16$ Deg 16 \(\Z/16\Z\) Not in database
$16$ Deg 16 \(\Z/2\Z \times \Z/12\Z\) 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.