Elliptic curve with Cremona label 478800cc2 (LMFDB label 478800.cc1)

• Label: 478800cc2
• Conductor: $478800$
• Discriminant: $1.173\times 10^{18}$
• j-invariant: $\frac{1367595682000}{402300927}$
• CM: no
• Rank: $1$
• Torsion structure: $\Z/{2}\Z$

Minimal Weierstrass equation

$y^2=x^3-330375x-51250750$

(, )

Mordell-Weil group structure

$\Z \oplus \Z/{2}\Z$

Mordell-Weil generators

$P$	$\hat{h}(P)$	Order
$(-470, 450)$	$3.6511735623992432859509659456$	$\infty$
$(-170, 0)$	$0$	$2$

Integral points

$(-470,\pm 450)$, $\left(-170, 0\right)$

Invariants

Conductor:	$N$	=	$478800$	=	$2^{4} \cdot 3^{2} \cdot 5^{2} \cdot 7 \cdot 19$
Discriminant:	$\Delta$	=	$1173109503132000000$	=	$2^{8} \cdot 3^{8} \cdot 5^{6} \cdot 7^{3} \cdot 19^{4}$
j-invariant:	$j$	=	$\frac{1367595682000}{402300927}$	=	$2^{4} \cdot 3^{-2} \cdot 5^{3} \cdot 7^{-3} \cdot 19^{-4} \cdot 881^{3}$
Endomorphism ring:	$\mathrm{End}(E)$	=	$\Z$
Geometric endomorphism ring:	$\mathrm{End}(E_{\overline{\Q}})$	=	$\Z$    (no potential complex multiplication)
Sato-Tate group:	$\mathrm{ST}(E)$	=	$\mathrm{SU}(2)$
Faltings height:	$h_{\mathrm{Faltings}}$	≈	$2.1730070035327428900578525546$
Stable Faltings height:	$h_{\mathrm{stable}}$	≈	$0.35688378260834098411502885522$
$abc$ quality:	$Q$	≈	$0.9219181984663756$
Szpiro ratio:	$\sigma_{m}$	≈	$3.8028449055346427$

BSD invariants

Analytic rank:	$r_{\mathrm{an}}$	=	$1$
Mordell-Weil rank:	$r$	=	$1$
Regulator:	$\mathrm{Reg}(E/\Q)$	≈	$3.6511735623992432859509659456$
Real period:	$\Omega$	≈	$0.20363521800600275529127697662$
Tamagawa product:	$\prod_{p}c_p$	=	$16$  = $1\cdot2^{2}\cdot2\cdot1\cdot2$
Torsion order:	$\#E(\Q)_{\mathrm{tor}}$	=	$2$
Special value:	$L'(E,1)$	≈	$2.9740300974276944439628958146$
Analytic order of Ш:	Ш${}_{\mathrm{an}}$	≈	$1$    (rounded)

BSD formula

$\displaystyle 2.974030097 \approx L'(E,1) = \frac{\# Ш(E/\Q)\cdot \Omega_E \cdot \mathrm{Reg}(E/\Q) \cdot \prod_p c_p}{\#E(\Q)_{\rm tor}^2} \approx \frac{1 \cdot 0.203635 \cdot 3.651174 \cdot 16}{2^2} \approx 2.974030097$

Modular invariants

Modular form 478800.2.a.cc

$q - q^{7} - 2 q^{11} - 6 q^{13} - 8 q^{17} - q^{19} + O(q^{20})$

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

Modular degree:	7962624
$\Gamma_0(N)$-optimal:	not computed^* (one of 2 curves in this isogeny class which might be optimal)
Manin constant:	1 (conditional^*)

^* The optimal curve in each isogeny class has not been determined in all cases for conductors over 400000. The Manin constant is correct provided that curve 478800cc1 is optimal.

Local data at primes of bad reduction

This elliptic curve is not semistable. There are 5 primes $p$ of bad reduction:

$p$	Tamagawa number	Kodaira symbol	Reduction type	Root number	$\mathrm{ord}_p(N)$	$\mathrm{ord}_p(\Delta)$	$\mathrm{ord}_p(\mathrm{den}(j))$
$2$	$1$	$I_0^{*}$	additive	-1	4	8	0
$3$	$4$	$I_{2}^{*}$	additive	-1	2	8	2
$5$	$2$	$I_0^{*}$	additive	1	2	6	0
$7$	$1$	$I_{3}$	nonsplit multiplicative	1	1	3	3
$19$	$2$	$I_{4}$	nonsplit multiplicative	1	1	4	4

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
$2$	2B	2.3.0.1

The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level $84 = 2^{2} \cdot 3 \cdot 7$, index $12$, genus $0$, and generators

$\left(\begin{array}{rr} 64 & 25 \\ 21 & 64 \end{array}\right),\left(\begin{array}{rr} 62 & 1 \\ 11 & 0 \end{array}\right),\left(\begin{array}{rr} 1 & 4 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 29 & 4 \\ 58 & 9 \end{array}\right),\left(\begin{array}{rr} 1 & 0 \\ 4 & 1 \end{array}\right),\left(\begin{array}{rr} 81 & 4 \\ 80 & 5 \end{array}\right),\left(\begin{array}{rr} 3 & 4 \\ 8 & 11 \end{array}\right),\left(\begin{array}{rr} 1 & 2 \\ 2 & 5 \end{array}\right)$.

The torsion field $K:=\Q(E[84])$ is a degree-$774144$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/84\Z)$.

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	$2$	$1575 = 3^{2} \cdot 5^{2} \cdot 7$
$3$	additive	$8$	$7600 = 2^{4} \cdot 5^{2} \cdot 19$
$5$	additive	$14$	$19152 = 2^{4} \cdot 3^{2} \cdot 7 \cdot 19$
$7$	nonsplit multiplicative	$8$	$68400 = 2^{4} \cdot 3^{2} \cdot 5^{2} \cdot 19$
$19$	nonsplit multiplicative	$20$	$25200 = 2^{4} \cdot 3^{2} \cdot 5^{2} \cdot 7$

Isogenies

This curve has non-trivial cyclic isogenies of degree $d$ for $d=$ 2.
Its isogeny class 478800cc consists of 2 curves linked by isogenies of degree 2.

Twists

The minimal quadratic twist of this elliptic curve is 1596b2, its twist by $60$.

Iwasawa invariants

No Iwasawa invariant data is available for this curve.

$p$-adic regulators

$p$-adic regulators are not yet computed for curves that are not $\Gamma_0$-optimal.