Properties

Label 2.73.l_bw
Base field $\F_{73}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple yes
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:  $1 + 11 x + 48 x^{2} + 803 x^{3} + 5329 x^{4}$
Frobenius angles:  $\pm0.389279142100$, $\pm0.944054191233$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(\sqrt{-3}, \sqrt{-19})\)
Galois group:  $C_2^2$
Jacobians:  $173$
Isomorphism classes:  165
Cyclic group of points:    no
Non-cyclic primes:   $2, 3$

This isogeny class is simple but not 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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $6192$ $28260288$ $152174889216$ $806175244594944$ $4297560176529101232$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $85$ $5305$ $391174$ $28388209$ $2073039925$ $151333458190$ $11047405055485$ $806460135758689$ $58871586697559062$ $4297625826560340025$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 173 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{73^{3}}$.

Endomorphism algebra over $\F_{73}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-3}, \sqrt{-19})\).
Endomorphism algebra over $\overline{\F}_{73}$
The base change of $A$ to $\F_{73^{3}}$ is 1.389017.bpm 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-19}) \)$)$

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.al_bw$2$(not in LMFDB)
2.73.aw_kh$3$(not in LMFDB)
2.73.a_z$6$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.73.al_bw$2$(not in LMFDB)
2.73.aw_kh$3$(not in LMFDB)
2.73.a_z$6$(not in LMFDB)
2.73.w_kh$6$(not in LMFDB)
2.73.a_az$12$(not in LMFDB)