Properties

Label 2.67.m_fa
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:  $1 + 12 x + 130 x^{2} + 804 x^{3} + 4489 x^{4}$
Frobenius angles:  $\pm0.493688974765$, $\pm0.771317596464$
Angle rank:  $2$ (numerical)
Number field:  4.0.153600.2
Galois group:  $D_{4}$
Jacobians:  $238$
Cyclic group of points:    no
Non-cyclic primes:   $2, 3$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5436$ $20678544$ $90296531676$ $406061756246016$ $1822738670746738236$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $80$ $4606$ $300224$ $20150830$ $1350051680$ $90459214702$ $6060713819408$ $406067603105374$ $27206534662141808$ $1822837805522904286$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 238 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 4.0.153600.2.

Base change

This is a primitive isogeny class.

Twists

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

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