Properties

Label 2.67.i_g
Base field $\F_{67}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple no
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{67}$
Dimension:  $2$
L-polynomial:  $( 1 - 8 x + 67 x^{2} )( 1 + 16 x + 67 x^{2} )$
  $1 + 8 x + 6 x^{2} + 536 x^{3} + 4489 x^{4}$
Frobenius angles:  $\pm0.337479373807$, $\pm0.932131395335$
Angle rank:  $2$ (numerical)
Jacobians:  $232$
Cyclic group of points:    no
Non-cyclic primes:   $2, 3$

This isogeny class is not 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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5040$ $19918080$ $91054257840$ $406030857523200$ $1822830687942289200$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $76$ $4438$ $302740$ $20149294$ $1350119836$ $90457609606$ $6060709927012$ $406067706650206$ $27206534611376620$ $1822837807024161718$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 232 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{67}$
The isogeny class factors as 1.67.ai $\times$ 1.67.q and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.67.ay_kc$2$(not in LMFDB)
2.67.ai_g$2$(not in LMFDB)
2.67.y_kc$2$(not in LMFDB)
2.67.at_io$3$(not in LMFDB)
2.67.an_gs$3$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.67.ay_kc$2$(not in LMFDB)
2.67.ai_g$2$(not in LMFDB)
2.67.y_kc$2$(not in LMFDB)
2.67.at_io$3$(not in LMFDB)
2.67.an_gs$3$(not in LMFDB)
2.67.ad_bu$6$(not in LMFDB)
2.67.ad_dq$6$(not in LMFDB)
2.67.d_bu$6$(not in LMFDB)
2.67.d_dq$6$(not in LMFDB)
2.67.n_gs$6$(not in LMFDB)
2.67.t_io$6$(not in LMFDB)