Properties

Label 2.67.m_gg
Base field $\F_{67}$
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:  $\F_{67}$
Dimension:  $2$
L-polynomial:  $1 + 12 x + 162 x^{2} + 804 x^{3} + 4489 x^{4}$
Frobenius angles:  $\pm0.562060081807$, $\pm0.681304311551$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-28 +3 \sqrt{2}})\)
Galois group:  $D_{4}$
Jacobians:  $112$
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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5468$ $20975248$ $89950748924$ $406056637794304$ $1822948643016159068$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $80$ $4670$ $299072$ $20150574$ $1350207200$ $90458038190$ $6060710470160$ $406067683361374$ $27206534418583664$ $1822837805800728350$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 112 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{67}$.

Endomorphism algebra over $\F_{67}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-28 +3 \sqrt{2}})\).

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.67.am_gg$2$(not in LMFDB)