Properties

Label 2.73.j_cn
Base field $\F_{73}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple yes
Geometrically simple yes
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{73}$
Dimension:  $2$
L-polynomial:  $1 + 9 x + 65 x^{2} + 657 x^{3} + 5329 x^{4}$
Frobenius angles:  $\pm0.394464246972$, $\pm0.824728683136$
Angle rank:  $2$ (numerical)
Number field:  4.0.521725.2
Galois group:  $D_{4}$
Jacobians:  $126$
Isomorphism classes:  126

This isogeny class is simple and geometrically simple, primitive, ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.

Newton polygon

This isogeny class is ordinary.

$p$-rank:  $2$
Slopes:  $[0, 0, 1, 1]$

Point counts

Point counts of the abelian variety

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $6061$ $28662469$ $151702520629$ $806565575118501$ $4297263062258569216$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $83$ $5379$ $389963$ $28401955$ $2072896598$ $151334677923$ $11047398353795$ $806460159211459$ $58871586748987019$ $4297625822663308014$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 126 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{73}$.

Endomorphism algebra over $\F_{73}$
The endomorphism algebra of this simple isogeny class is 4.0.521725.2.

Base change

This is a primitive isogeny class.

Twists

Below is a list of all twists of this isogeny class.

TwistExtension degreeCommon base change
2.73.aj_cn$2$(not in LMFDB)