Properties

Label 2.79.c_fc
Base field $\F_{79}$
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:  $\F_{79}$
Dimension:  $2$
L-polynomial:  $1 + 2 x + 132 x^{2} + 158 x^{3} + 6241 x^{4}$
Frobenius angles:  $\pm0.424146424303$, $\pm0.613329515734$
Angle rank:  $2$ (numerical)
Number field:  4.0.1325376.2
Galois group:  $D_{4}$
Jacobians:  $208$
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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $6534$ $40602276$ $242934466302$ $1516756324848336$ $9468292884479275374$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $82$ $6502$ $492730$ $38941030$ $3077061862$ $243087065782$ $19203912409582$ $1517108910135934$ $119851595357758450$ $9468276072537756502$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 208 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{79}$
The endomorphism algebra of this simple isogeny class is 4.0.1325376.2.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.79.ac_fc$2$(not in LMFDB)