Properties

Label 2.67.e_cf
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:  $( 1 - 7 x + 67 x^{2} )( 1 + 11 x + 67 x^{2} )$
  $1 + 4 x + 57 x^{2} + 268 x^{3} + 4489 x^{4}$
Frobenius angles:  $\pm0.359361632871$, $\pm0.734535271332$
Angle rank:  $2$ (numerical)
Jacobians:  $252$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $4819$ $20601225$ $90513387952$ $406280569451625$ $1822706906761086379$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $72$ $4588$ $300948$ $20161684$ $1350028152$ $90457678726$ $6060716289000$ $406067677489636$ $27206534753351916$ $1822837805029887868$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 252 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.ah $\times$ 1.67.l 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.as_id$2$(not in LMFDB)
2.67.ae_cf$2$(not in LMFDB)
2.67.s_id$2$(not in LMFDB)
2.67.ax_jm$3$(not in LMFDB)
2.67.ac_dv$3$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.67.as_id$2$(not in LMFDB)
2.67.ae_cf$2$(not in LMFDB)
2.67.s_id$2$(not in LMFDB)
2.67.ax_jm$3$(not in LMFDB)
2.67.ac_dv$3$(not in LMFDB)
2.67.am_gn$6$(not in LMFDB)
2.67.aj_w$6$(not in LMFDB)
2.67.c_dv$6$(not in LMFDB)
2.67.j_w$6$(not in LMFDB)
2.67.m_gn$6$(not in LMFDB)
2.67.x_jm$6$(not in LMFDB)