Properties

Label 2.73.a_aeg
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:  $( 1 - 16 x + 73 x^{2} )( 1 + 16 x + 73 x^{2} )$
  $1 - 110 x^{2} + 5329 x^{4}$
Frobenius angles:  $\pm0.114200251220$, $\pm0.885799748780$
Angle rank:  $1$ (numerical)
Jacobians:  $231$
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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5220$ $27248400$ $151334653860$ $806378250240000$ $4297625833443920100$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $74$ $5110$ $389018$ $28395358$ $2073071594$ $151335081430$ $11047398519098$ $806460201328318$ $58871586708267914$ $4297625837184282550$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 231 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{73^{2}}$.

Endomorphism algebra over $\F_{73}$
The isogeny class factors as 1.73.aq $\times$ 1.73.q and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:
Endomorphism algebra over $\overline{\F}_{73}$
The base change of $A$ to $\F_{73^{2}}$ is 1.5329.aeg 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-1}) \)$)$

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.73.abg_pm$2$(not in LMFDB)
2.73.bg_pm$2$(not in LMFDB)
2.73.aw_ji$4$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.73.abg_pm$2$(not in LMFDB)
2.73.bg_pm$2$(not in LMFDB)
2.73.aw_ji$4$(not in LMFDB)
2.73.am_ha$4$(not in LMFDB)
2.73.ak_by$4$(not in LMFDB)
2.73.a_eg$4$(not in LMFDB)
2.73.k_by$4$(not in LMFDB)
2.73.m_ha$4$(not in LMFDB)
2.73.w_ji$4$(not in LMFDB)
2.73.aq_hb$6$(not in LMFDB)
2.73.q_hb$6$(not in LMFDB)
2.73.a_ads$8$(not in LMFDB)
2.73.a_ds$8$(not in LMFDB)
2.73.ag_abl$12$(not in LMFDB)
2.73.g_abl$12$(not in LMFDB)