Properties

Label 2.61.h_dw
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:  $1 + 7 x + 100 x^{2} + 427 x^{3} + 3721 x^{4}$
Frobenius angles:  $\pm0.451881454382$, $\pm0.704324908154$
Angle rank:  $2$ (numerical)
Number field:  4.0.43788077.1
Galois group:  $D_{4}$
Jacobians:  $196$
Isomorphism classes:  196
Cyclic group of points:    no
Non-cyclic primes:   $2$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $4256$ $14419328$ $51412411904$ $191709060849152$ $713305909211597856$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $69$ $3873$ $226506$ $13845969$ $844552489$ $51520309734$ $3142749386685$ $191707291841025$ $11694145776485970$ $713342913436293193$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 196 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 4.0.43788077.1.

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.ah_dw$2$(not in LMFDB)