Properties

Label 2.79.g_fj
Base field $\F_{79}$
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:  $\F_{79}$
Dimension:  $2$
L-polynomial:  $1 + 6 x + 139 x^{2} + 474 x^{3} + 6241 x^{4}$
Frobenius angles:  $\pm0.458853099895$, $\pm0.654461293837$
Angle rank:  $2$ (numerical)
Number field:  4.0.60237072.1
Galois group:  $D_{4}$
Jacobians:  $180$
Isomorphism classes:  180

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $6861$ $40486761$ $242661714192$ $1516862128984713$ $9468294380096560941$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $86$ $6484$ $492176$ $38943748$ $3077062346$ $243087199486$ $19203918090422$ $1517108827582084$ $119851594695324848$ $9468276085176210964$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 180 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{79}$.

Endomorphism algebra over $\F_{79}$
The endomorphism algebra of this simple isogeny class is 4.0.60237072.1.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.79.ag_fj$2$(not in LMFDB)