Properties

Label 2.73.ac_d
Base field $\F_{73}$
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:  $\F_{73}$
Dimension:  $2$
L-polynomial:  $( 1 - 13 x + 73 x^{2} )( 1 + 11 x + 73 x^{2} )$
  $1 - 2 x + 3 x^{2} - 146 x^{3} + 5329 x^{4}$
Frobenius angles:  $\pm0.224822766824$, $\pm0.722612475433$
Angle rank:  $2$ (numerical)
Jacobians:  $384$
Cyclic group of points:    yes

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5185$ $28418985$ $151167803920$ $807032815670025$ $4297734787679153425$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $72$ $5332$ $388590$ $28418404$ $2073124152$ $151334197774$ $11047403528856$ $806460002229316$ $58871586229664190$ $4297625829898730932$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 384 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{73}$.

Endomorphism algebra over $\F_{73}$
The isogeny class factors as 1.73.an $\times$ 1.73.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 is a list of all twists of this isogeny class.

TwistExtension degreeCommon base change
2.73.ay_ld$2$(not in LMFDB)
2.73.c_d$2$(not in LMFDB)
2.73.y_ld$2$(not in LMFDB)