# Properties

 Label 1.23.b Base field $\F_{23}$ Dimension $1$ $p$-rank $1$ 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: $\F_{23}$ Dimension: $1$ L-polynomial: $1 + x + 23 x^{2}$ Frobenius angles: $\pm0.533246515430$ Angle rank: $1$ (numerical) Number field: $$\Q(\sqrt{-91})$$ Galois group: $C_2$ Jacobians: 2

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 2 curves, and hence is principally polarizable:

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $25$ $575$ $12100$ $278875$ $6438875$

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $25$ $575$ $12100$ $278875$ $6438875$ $148055600$ $3404747525$ $78310609875$ $1801154829100$ $41426517680375$

## Decomposition and endomorphism algebra

Endomorphism algebra over $\F_{23}$
 The endomorphism algebra of this simple isogeny class is $$\Q(\sqrt{-91})$$.
All geometric endomorphisms are defined over $\F_{23}$.

## Base change

This is a primitive isogeny class.

## Twists

Below is a list of all twists of this isogeny class.
TwistExtension degreeCommon base change
1.23.ab$2$(not in LMFDB)