# Properties

 Label 86190.bx1 Conductor 86190 Discriminant 688416768000 j-invariant $$\frac{4980061835533}{313344000}$$ CM no Rank 2 Torsion Structure $$\Z/{2}\Z$$

# Related objects

Show commands for: Magma / SageMath / Pari/GP

## Minimal Weierstrass equation

magma: E := EllipticCurve([1, 1, 1, -4625, 112367]); // or

magma: E := EllipticCurve("86190cg1");

sage: E = EllipticCurve([1, 1, 1, -4625, 112367]) # or

sage: E = EllipticCurve("86190cg1")

gp: E = ellinit([1, 1, 1, -4625, 112367]) \\ or

gp: E = ellinit("86190cg1")

$$y^2 + x y + y = x^{3} + x^{2} - 4625 x + 112367$$

## Mordell-Weil group structure

$$\Z^2 \times \Z/{2}\Z$$

### Infinite order Mordell-Weil generators and heights

magma: Generators(E);

sage: E.gens()

 $$P$$ = $$\left(-73, 296\right)$$ $$\left(-69, 364\right)$$ $$\hat{h}(P)$$ ≈ 0.743422294149 2.97406660399

## Torsion generators

magma: TorsionSubgroup(E);

sage: E.torsion_subgroup().gens()

gp: elltors(E)

$$\left(31, -16\right)$$

## Integral points

magma: IntegralPoints(E);

sage: E.integral_points()

$$\left(-73, 296\right)$$, $$\left(-73, -224\right)$$, $$\left(-69, 364\right)$$, $$\left(-69, -296\right)$$, $$\left(-33, 496\right)$$, $$\left(-33, -464\right)$$, $$\left(5, 296\right)$$, $$\left(5, -302\right)$$, $$\left(15, 208\right)$$, $$\left(15, -224\right)$$, $$\left(27, 76\right)$$, $$\left(27, -104\right)$$, $$\left(31, -16\right)$$, $$\left(47, 16\right)$$, $$\left(47, -64\right)$$, $$\left(57, 166\right)$$, $$\left(57, -224\right)$$, $$\left(67, 296\right)$$, $$\left(67, -364\right)$$, $$\left(95, 688\right)$$, $$\left(95, -784\right)$$, $$\left(135, 1336\right)$$, $$\left(135, -1472\right)$$, $$\left(227, 3176\right)$$, $$\left(227, -3404\right)$$, $$\left(447, 9136\right)$$, $$\left(447, -9584\right)$$, $$\left(607, 14576\right)$$, $$\left(607, -15184\right)$$, $$\left(2631, 133624\right)$$, $$\left(2631, -136256\right)$$, $$\left(21897, 3229366\right)$$, $$\left(21897, -3251264\right)$$

## Invariants

 magma: Conductor(E);  sage: E.conductor().factor()  gp: ellglobalred(E)[1] Conductor: $$86190$$ = $$2 \cdot 3 \cdot 5 \cdot 13^{2} \cdot 17$$ magma: Discriminant(E);  sage: E.discriminant().factor()  gp: E.disc Discriminant: $$688416768000$$ = $$2^{14} \cdot 3^{2} \cdot 5^{3} \cdot 13^{3} \cdot 17$$ magma: jInvariant(E);  sage: E.j_invariant().factor()  gp: E.j j-invariant: $$\frac{4980061835533}{313344000}$$ = $$2^{-14} \cdot 3^{-2} \cdot 5^{-3} \cdot 17^{-1} \cdot 17077^{3}$$ Endomorphism ring: $$\Z$$ (no Complex Multiplication) Sato-Tate Group: $\mathrm{SU}(2)$

## BSD invariants

 magma: Rank(E);  sage: E.rank() Rank: $$2$$ magma: Regulator(E);  sage: E.regulator() Regulator: $$0.349537604328$$ magma: RealPeriod(E);  sage: E.period_lattice().omega()  gp: E.omega[1] Real period: $$0.890315536508$$ 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: $$168$$  = $$( 2 \cdot 7 )\cdot2\cdot3\cdot2\cdot1$$ magma: Order(TorsionSubgroup(E));  sage: E.torsion_order()  gp: elltors(E)[1] Torsion order: $$2$$ magma: MordellWeilShaInformation(E);  sage: E.sha().an_numerical() Analytic order of Ш: $$1$$ (rounded)

## Modular invariants

#### Modular form 86190.2.a.bx

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)

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

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

 magma: ModularDegree(E);  sage: E.modular_degree() Modular degree: 193536 $$\Gamma_0(N)$$-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])

$$L^{(2)}(E,1)/2!$$ ≈ $$13.0703479085$$

## 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$$(j)_{-}$$
$$2$$ $$14$$ $$I_{14}$$ Split multiplicative -1 1 14 14
$$3$$ $$2$$ $$I_{2}$$ Non-split multiplicative 1 1 2 2
$$5$$ $$3$$ $$I_{3}$$ Split multiplicative -1 1 3 3
$$13$$ $$2$$ $$III$$ Additive -1 2 3 0
$$17$$ $$1$$ $$I_{1}$$ Non-split multiplicative 1 1 1 1

## Galois representations

The image of the 2-adic representation attached to this elliptic curve is the subgroup of $\GL(2,\Z_2)$ with Rouse label X6.

This subgroup is the pull-back of the subgroup of $\GL(2,\Z_2/2^1\Z_2)$ generated by $\left(\begin{array}{rr} 1 & 1 \\ 0 & 1 \end{array}\right)$ and has index 3.

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 $$p$$ except those listed.

prime Image of Galois representation
$$2$$ B

## $p$-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

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

## Isogenies

This curve has non-trivial cyclic isogenies of degree $$d$$ for $$d=$$ 2.
Its isogeny class 86190.bx consists of 2 curves linked by isogenies of degree 2.

## 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 $E(\Q)_{\rm tors}$ $\cong \Z/{2}\Z$ are as follows:

$[K:\Q]$ $K$ $E(K)_{\rm tors}$ Base-change curve
2 $$\Q(\sqrt{1105})$$ $$\Z/2\Z \times \Z/2\Z$$ Not in database
4 4.0.11951680.7 $$\Z/4\Z$$ 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.