Properties

Label 2.79.aq_gv
Base field $\F_{79}$
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:  $\F_{79}$
Dimension:  $2$
L-polynomial:  $1 - 16 x + 177 x^{2} - 1264 x^{3} + 6241 x^{4}$
Frobenius angles:  $\pm0.189818400690$, $\pm0.476848265977$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(\sqrt{-3}, \sqrt{5})\)
Galois group:  $C_2^2$
Jacobians:  $282$
Cyclic group of points:    no
Non-cyclic primes:   $3$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5139$ $39565161$ $243388302336$ $1516996680903369$ $9468491675338364499$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $64$ $6340$ $493648$ $38947204$ $3077126464$ $243089242846$ $19203917749696$ $1517108740289284$ $119851595139504112$ $9468276081381698500$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 282 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{79^{3}}$.

Endomorphism algebra over $\F_{79}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-3}, \sqrt{5})\).
Endomorphism algebra over $\overline{\F}_{79}$
The base change of $A$ to $\F_{79^{3}}$ is 1.493039.ls 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-15}) \)$)$

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.79.q_gv$2$(not in LMFDB)
2.79.bg_py$3$(not in LMFDB)
2.79.abg_py$6$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.79.q_gv$2$(not in LMFDB)
2.79.bg_py$3$(not in LMFDB)
2.79.abg_py$6$(not in LMFDB)
2.79.a_adu$6$(not in LMFDB)
2.79.q_gv$6$(not in LMFDB)
2.79.a_du$12$(not in LMFDB)