Properties

Label 2.64.ay_kf
Base field $\F_{2^{6}}$
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:  $\F_{2^{6}}$
Dimension:  $2$
L-polynomial:  $1 - 24 x + 265 x^{2} - 1536 x^{3} + 4096 x^{4}$
Frobenius angles:  $\pm0.131906520153$, $\pm0.301235555081$
Angle rank:  $2$ (numerical)
Number field:  4.0.609168.2
Galois group:  $D_{4}$
Jacobians:  $60$
Isomorphism classes:  60

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $2802$ $16593444$ $68889548898$ $281596851067392$ $1152953950897267122$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $41$ $4051$ $262793$ $16784479$ $1073772041$ $68719461235$ $4398046632041$ $281475000387775$ $18014398898108969$ $1152921507908712211$

Jacobians and polarizations

This isogeny class contains the Jacobians of 60 curves (of which all are hyperelliptic), and hence is principally polarizable:

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{2^{6}}$.

Endomorphism algebra over $\F_{2^{6}}$
The endomorphism algebra of this simple isogeny class is 4.0.609168.2.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.64.y_kf$2$(not in LMFDB)