Properties

Label 1.307.abg
Base field $\F_{307}$
Dimension $1$
$p$-rank $1$
Ordinary yes
Supersingular no
Simple yes
Geometrically simple yes
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

Related objects

Downloads

Learn more

Invariants

Base field:  $\F_{307}$
Dimension:  $1$
L-polynomial:  $1 - 32 x + 307 x^{2}$
Frobenius angles:  $\pm0.133628240606$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(\sqrt{-51}) \)
Galois group:  $C_2$
Jacobians:  $8$

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:  $1$
Slopes:  $[0, 1]$

Point counts

Point counts of the abelian variety

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $276$ $93840$ $28931148$ $8882894400$ $2727043982916$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $276$ $93840$ $28931148$ $8882894400$ $2727043982916$ $837202038725520$ $257021012451250428$ $78905450534991417600$ $24223973309166313930356$ $7436759805839900272189200$

Jacobians and polarizations

This isogeny class contains the Jacobians of 8 curves (of which all are hyperelliptic), and hence is principally polarizable:

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{307}$.

Endomorphism algebra over $\F_{307}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-51}) \).

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
1.307.bg$2$(not in LMFDB)