Genus 2 curve 160507.a.160507.1

• Label: 160507.a.160507.1
• Conductor: $160507$
• Discriminant: $-160507$
• Mordell-Weil group: \(\Z \oplus \Z \oplus \Z\)
• Sato-Tate group: $\mathrm{USp}(4)$
• \(\End(J_{\overline{\Q}}) \otimes \R\): \(\R\)
• \(\End(J_{\overline{\Q}}) \otimes \Q\): \(\Q\)
• \(\End(J) \otimes \Q\): \(\Q\)
• \(\overline{\Q}\)-simple: yes
• \(\mathrm{GL}_2\)-type: no

Minimal equation

$y^2 + y = x^5 + 2x^4 - 2x^3 - x^2$

(, )

Invariants

Conductor:	\( N \)	\(=\)	\(160507\)	\(=\)	\( 160507 \)
Discriminant:	\( \Delta \)	\(=\)	\(-160507\)	\(=\)	\( -160507 \)

Igusa-Clebsch invariants

\( I_2 \)	\(=\)	\(224\)	\(=\)	\( 2^{5} \cdot 7 \)
\( I_4 \)	\(=\)	\(3856\)	\(=\)	\( 2^{4} \cdot 241 \)
\( I_6 \)	\(=\)	\(161264\)	\(=\)	\( 2^{4} \cdot 10079 \)
\( I_{10} \)	\(=\)	\(-642028\)	\(=\)	\( - 2^{2} \cdot 160507 \)

Automorphism group

\(\mathrm{Aut}(X)\)	\(\simeq\)	$C_2$
\(\mathrm{Aut}(X_{\overline{\Q}})\)	\(\simeq\)	$C_2$

Rational points

Known points
\((1 : 0 : 0)\)	\((0 : 0 : 1)\)	\((0 : -1 : 1)\)	\((1 : 0 : 1)\)	\((-1 : 1 : 1)\)	\((1 : -1 : 1)\)
\((-1 : -2 : 1)\)	\((-2 : 3 : 1)\)	\((-2 : -4 : 1)\)	\((1 : -6 : 4)\)	\((3 : 18 : 1)\)	\((3 : -19 : 1)\)
\((1 : -58 : 4)\)	\((6 : 99 : 1)\)	\((6 : -100 : 1)\)

Number of rational Weierstrass points: \(1\)

This curve is locally solvable everywhere.

Mordell-Weil group of the Jacobian

Group structure: \(\Z \oplus \Z \oplus \Z\)

Generator	$D_0$						Height	Order
\((1 : -1 : 1) - (1 : 0 : 0)\)	\(x - z\)	\(=\)	\(0,\)	\(y\)	\(=\)	\(-z^3\)	\(0.709131\)	\(\infty\)
\((-1 : -2 : 1) - (1 : 0 : 0)\)	\(x + z\)	\(=\)	\(0,\)	\(y\)	\(=\)	\(-2z^3\)	\(0.865919\)	\(\infty\)
\((0 : -1 : 1) - (1 : 0 : 0)\)	\(x\)	\(=\)	\(0,\)	\(y\)	\(=\)	\(-z^3\)	\(0.135793\)	\(\infty\)

2-torsion field: 5.3.2568112.1

BSD invariants

Hasse-Weil conjecture:	unverified
Analytic rank:	\(3\)   (upper bound)
Mordell-Weil rank:	\(3\)
2-Selmer rank:	\(3\)
Regulator:	\( 0.067015 \)
Real period:	\( 18.05420 \)
Tamagawa product:	\( 1 \)
Torsion order:	\( 1 \)
Leading coefficient:	\( 1.209905 \)
Analytic order of Ш:	\( 1 \)   (rounded)
Order of Ш:	square

Local invariants

Prime	ord(\(N\))	ord(\(\Delta\))	Tamagawa	L-factor	Cluster picture
\(160507\)	\(1\)	\(1\)	\(1\)	\(( 1 - T )( 1 + 599 T + 160507 T^{2} )\)

Galois representations

The mod-$\ell$ Galois representation has maximal image \(\GSp(4,\F_\ell)\) for all primes \( \ell \) except those listed.

Prime \(\ell\)	mod-\(\ell\) image	Is torsion prime?
\(2\)	2.6.1	no

Sato-Tate group

\(\mathrm{ST}\)	\(\simeq\)	$\mathrm{USp}(4)$
\(\mathrm{ST}^0\)	\(\simeq\)	\(\mathrm{USp}(4)\)

Decomposition of the Jacobian

Simple over \(\overline{\Q}\)

Endomorphisms of the Jacobian

Not of \(\GL_2\)-type over \(\Q\)

Endomorphism ring over \(\Q\):

\(\End (J_{})\)	\(\simeq\)	\(\Z\)
\(\End (J_{}) \otimes \Q \)	\(\simeq\)	\(\Q\)
\(\End (J_{}) \otimes \R\)	\(\simeq\)	\(\R\)

All \(\overline{\Q}\)-endomorphisms of the Jacobian are defined over \(\Q\).