Properties

Label 2.61.g_g
Base field $\F_{61}$
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:  $\F_{61}$
Dimension:  $2$
L-polynomial:  $1 + 6 x + 6 x^{2} + 366 x^{3} + 3721 x^{4}$
Frobenius angles:  $\pm0.324554048754$, $\pm0.862241771468$
Angle rank:  $2$ (numerical)
Number field:  4.0.7600.1
Galois group:  $D_{4}$
Jacobians:  $222$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $4100$ $13759600$ $51794812100$ $191784827257600$ $713297006875062500$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $68$ $3698$ $228188$ $13851438$ $844541948$ $51520314818$ $3142736983748$ $191707347539038$ $11694146144741588$ $713342913507682898$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 222 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{61}$.

Endomorphism algebra over $\F_{61}$
The endomorphism algebra of this simple isogeny class is 4.0.7600.1.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.61.ag_g$2$(not in LMFDB)