Properties

Label 2.97.ak_ga
Base field $\F_{97}$
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:  $\F_{97}$
Dimension:  $2$
L-polynomial:  $1 - 10 x + 156 x^{2} - 970 x^{3} + 9409 x^{4}$
Frobenius angles:  $\pm0.271913980885$, $\pm0.547642936243$
Angle rank:  $2$ (numerical)
Number field:  4.0.7291200.2
Galois group:  $D_{4}$
Jacobians:  $504$
Cyclic group of points:    no
Non-cyclic primes:   $3$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $8586$ $90547956$ $833675262714$ $7837660479010896$ $73744175268235743786$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $88$ $9622$ $913444$ $88531846$ $8587545508$ $832972409638$ $80798251748344$ $7837433378912638$ $760231060067135608$ $73742412701675190022$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 504 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{97}$.

Endomorphism algebra over $\F_{97}$
The endomorphism algebra of this simple isogeny class is 4.0.7291200.2.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.97.k_ga$2$(not in LMFDB)