Properties

Label 2.67.c_eo
Base field $\F_{67}$
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:  $\F_{67}$
Dimension:  $2$
L-polynomial:  $1 + 2 x + 118 x^{2} + 134 x^{3} + 4489 x^{4}$
Frobenius angles:  $\pm0.438900223916$, $\pm0.601315046347$
Angle rank:  $2$ (numerical)
Number field:  4.0.4510712.1
Galois group:  $D_{4}$
Jacobians:  $160$
Isomorphism classes:  256
Cyclic group of points:    no
Non-cyclic primes:   $2$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $4744$ $21215168$ $90368821288$ $405884520863744$ $1822855735191360424$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $70$ $4722$ $300466$ $20142030$ $1350138390$ $90458426946$ $6060712504546$ $406067709508830$ $27206534160659494$ $1822837800931178962$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 160 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{67}$.

Endomorphism algebra over $\F_{67}$
The endomorphism algebra of this simple isogeny class is 4.0.4510712.1.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.67.ac_eo$2$(not in LMFDB)