Properties

Label 1.307.aj
Base Field $\F_{307}$
Dimension $1$
Ordinary Yes
$p$-rank $1$
Principally polarizable Yes
Contains a Jacobian Yes

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Invariants

Base field:  $\F_{307}$
Dimension:  $1$
L-polynomial:  $1 - 9 x + 307 x^{2}$
Frobenius angles:  $\pm0.417322426088$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(\sqrt{-1147}) \)
Galois group:  $C_2$
Jacobians:  6

This isogeny class is simple and geometrically simple.

Newton polygon

This isogeny class is ordinary.

$p$-rank:  $1$
Slopes:  $[0, 1]$

Point counts

This isogeny class contains the Jacobians of 6 curves, and hence is principally polarizable:

Point counts of the abelian variety

$r$ 1 2 3 4 5 6 7 8 9 10
$A(\F_{q^r})$ 299 94783 28942004 8882778411 2727039137069 837201992435536 257021012441194391 78905450526269856723 24223973308691864685068 7436759805832550910407743

Point counts of the curve

$r$ 1 2 3 4 5 6 7 8 9 10
$C(\F_{q^r})$ 299 94783 28942004 8882778411 2727039137069 837201992435536 257021012441194391 78905450526269856723 24223973308691864685068 7436759805832550910407743

Decomposition and endomorphism algebra

Endomorphism algebra over $\F_{307}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-1147}) \).
All geometric endomorphisms are defined over $\F_{307}$.

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.j$2$(not in LMFDB)