Properties

Label 2.97.q_gd
Base field $\F_{97}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple yes
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{97}$
Dimension:  $2$
L-polynomial:  $1 + 16 x + 159 x^{2} + 1552 x^{3} + 9409 x^{4}$
Frobenius angles:  $\pm0.468438856296$, $\pm0.864894477038$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(\sqrt{-3}, \sqrt{11})\)
Galois group:  $C_2^2$
Jacobians:  $254$

This isogeny class is simple but not 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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $11137$ $89107137$ $833996338756$ $7836108092599689$ $73740821790222677377$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $114$ $9472$ $913794$ $88514308$ $8587154994$ $832975028422$ $80798278260786$ $7837433641539076$ $760231055939215938$ $73742412706640895232$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 254 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{97^{3}}$.

Endomorphism algebra over $\F_{97}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-3}, \sqrt{11})\).
Endomorphism algebra over $\overline{\F}_{97}$
The base change of $A$ to $\F_{97^{3}}$ is 1.912673.vo 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-33}) \)$)$

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.97.aq_gd$2$(not in LMFDB)
2.97.abg_ri$3$(not in LMFDB)
2.97.a_ack$6$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.97.aq_gd$2$(not in LMFDB)
2.97.abg_ri$3$(not in LMFDB)
2.97.a_ack$6$(not in LMFDB)
2.97.bg_ri$6$(not in LMFDB)
2.97.a_ck$12$(not in LMFDB)