Properties

Label 18562c1
Conductor 18562
Discriminant 37124
j-invariant \( \frac{822656953}{37124} \)
CM no
Rank 3
Torsion Structure \(\mathrm{Trivial}\)

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Minimal Weierstrass equation

magma: E := EllipticCurve([1, 0, 1, -20, 30]); // or
magma: E := EllipticCurve("18562c1");
sage: E = EllipticCurve([1, 0, 1, -20, 30]) # or
sage: E = EllipticCurve("18562c1")
gp: E = ellinit([1, 0, 1, -20, 30]) \\ or
gp: E = ellinit("18562c1")

\( y^2 + x y + y = x^{3} - 20 x + 30 \)

Mordell-Weil group structure

\(\Z^3\)

Infinite order Mordell-Weil generators and heights

magma: Generators(E);
sage: E.gens()

\(P\) =  \( \left(-3, 9\right) \)\( \left(-1, 7\right) \)\( \left(0, 5\right) \)
\(\hat{h}(P)\) ≈  1.48959327911.250997443141.43908584307

Integral points

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

\( \left(-5, 5\right) \), \( \left(-3, 9\right) \), \( \left(-1, 7\right) \), \( \left(0, 5\right) \), \( \left(2, -1\right) \), \( \left(3, -1\right) \), \( \left(4, 2\right) \), \( \left(5, 5\right) \), \( \left(12, 33\right) \), \( \left(14, 43\right) \), \( \left(23, 97\right) \), \( \left(38, 214\right) \), \( \left(60, 434\right) \), \( \left(147, 1709\right) \), \( \left(157, 1889\right) \)

Note: only one of each pair $\pm P$ is listed.

Invariants

magma: Conductor(E);
sage: E.conductor().factor()
gp: ellglobalred(E)[1]
Conductor: \( 18562 \)  =  \(2 \cdot 9281\)
magma: Discriminant(E);
sage: E.discriminant().factor()
gp: E.disc
Discriminant: \(37124 \)  =  \(2^{2} \cdot 9281 \)
magma: jInvariant(E);
sage: E.j_invariant().factor()
gp: E.j
j-invariant: \( \frac{822656953}{37124} \)  =  \(2^{-2} \cdot 937^{3} \cdot 9281^{-1}\)
Endomorphism ring: \(\Z\)   (no Complex Multiplication)
Sato-Tate Group: $\mathrm{SU}(2)$

BSD invariants

magma: Rank(E);
sage: E.rank()
Rank: \(3\)
magma: Regulator(E);
sage: E.regulator()
Regulator: \(0.566748574885\)
magma: RealPeriod(E);
sage: E.period_lattice().omega()
gp: E.omega[1]
Real period: \(3.6146341387\)
magma: TamagawaNumbers(E);
sage: E.tamagawa_numbers()
gp: gr=ellglobalred(E); [[gr[4][i,1],gr[5][i][4]] | i<-[1..#gr[4][,1]]]
Tamagawa product: \( 2 \)  = \( 2\cdot1 \)
magma: Order(TorsionSubgroup(E));
sage: E.torsion_order()
gp: elltors(E)[1]
Torsion order: \(1\)
magma: MordellWeilShaInformation(E);
sage: E.sha().an_numerical()
Analytic order of Ш: \(1\) (rounded)

Modular invariants

Modular form 18562.2.a.a

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

\( q - q^{2} - 2q^{3} + q^{4} - 3q^{5} + 2q^{6} - 4q^{7} - q^{8} + q^{9} + 3q^{10} - 6q^{11} - 2q^{12} - 5q^{13} + 4q^{14} + 6q^{15} + q^{16} - 5q^{17} - q^{18} + q^{19} + O(q^{20}) \)

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

magma: ModularDegree(E);
sage: E.modular_degree()
Modular degree: 4720
\( \Gamma_0(N) \)-optimal: yes
Manin constant: 1

Special L-value

magma: Lr1 where r,Lr1 := AnalyticRank(E: Precision:=12);
sage: r = E.rank();
sage: E.lseries().dokchitser().derivative(1,r)/r.factorial()
gp: ar = ellanalyticrank(E);
gp: ar[2]/factorial(ar[1])

\( L^{(3)}(E,1)/3! \) ≈ \( 4.09717749367 \)

Local data

magma: [LocalInformation(E,p) : p in BadPrimes(E)];
sage: E.local_data()
gp: ellglobalred(E)[5]
prime Tamagawa number Kodaira symbol Reduction type Root number ord(\(N\)) ord(\(\Delta\)) ord\((j)_{-}\)
\(2\) \(2\) \( I_{2} \) Non-split multiplicative 1 1 2 2
\(9281\) \(1\) \( I_{1} \) Non-split multiplicative 1 1 1 1

Galois representations

The 2-adic representation attached to this elliptic curve is surjective.

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

The mod \( p \) Galois representation has maximal image \(\GL(2,\F_p)\) for all primes \( p \) .

$p$-adic data

$p$-adic regulators

sage: [E.padic_regulator(p) for p in primes(3,20) if E.conductor().valuation(p)<2]

Note: \(p\)-adic regulator data only exists for primes \(p\ge5\) of good ordinary reduction.

Iwasawa invariants

$p$ 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 9281
Reduction type nonsplit ordinary ordinary ordinary ordinary ordinary ordinary ordinary ordinary ordinary ordinary ordinary ordinary ordinary ordinary nonsplit
$\lambda$-invariant(s) 6 5 3 3 3 3 3 3 3 3 3 3 3 3 3 ?
$\mu$-invariant(s) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ?

An entry ? indicates that the invariants have not yet been computed.

Isogenies

This curve has no rational isogenies. Its isogeny class 18562c consists of this curve only.

Growth of torsion in number fields

The number fields $K$ of degree up to 7 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
3 3.3.9281.1 \(\Z/2\Z\) Not in database
6 6.6.799437135041.1 \(\Z/2\Z \times \Z/2\Z\) Not in database

We only show fields where the torsion growth is primitive. For each field $K$ we either show its label, or a defining polynomial when $K$ is not in the database.