Properties

Label 2.89.ay_lq
Base field $\F_{89}$
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:  $\F_{89}$
Dimension:  $2$
L-polynomial:  $1 - 24 x + 302 x^{2} - 2136 x^{3} + 7921 x^{4}$
Frobenius angles:  $\pm0.162157367224$, $\pm0.369365674080$
Angle rank:  $2$ (numerical)
Number field:  4.0.39600.1
Galois group:  $D_{4}$
Jacobians:  $156$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $6064$ $62968576$ $498048502576$ $3937106688159744$ $31181671544439813424$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $66$ $7950$ $706482$ $62750494$ $5584050786$ $496981598766$ $44231350549074$ $3936589004559934$ $350356404478800258$ $31181719919420527950$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 156 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{89}$.

Endomorphism algebra over $\F_{89}$
The endomorphism algebra of this simple isogeny class is 4.0.39600.1.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.89.y_lq$2$(not in LMFDB)