Properties

Label 2.53.c_c
Base field $\F_{53}$
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:  $\F_{53}$
Dimension:  $2$
L-polynomial:  $1 + 2 x + 2 x^{2} + 106 x^{3} + 2809 x^{4}$
Frobenius angles:  $\pm0.280965808385$, $\pm0.780965808385$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(i, \sqrt{105})\)
Galois group:  $C_2^2$
Jacobians:  $184$
Cyclic group of points:    no
Non-cyclic primes:   $2$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $2920$ $7895680$ $22211158120$ $62341762662400$ $174876163561273000$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $56$ $2810$ $149192$ $7900878$ $418168456$ $22164361130$ $1174709209912$ $62259667934878$ $3299763716564696$ $174887470365513050$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 184 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{53^{4}}$.

Endomorphism algebra over $\F_{53}$
The endomorphism algebra of this simple isogeny class is \(\Q(i, \sqrt{105})\).
Endomorphism algebra over $\overline{\F}_{53}$
The base change of $A$ to $\F_{53^{4}}$ is 1.7890481.hry 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-105}) \)$)$
Remainder of endomorphism lattice by field

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.53.ac_c$2$(not in LMFDB)
2.53.ac_c$4$(not in LMFDB)
2.53.a_aea$8$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.53.ac_c$2$(not in LMFDB)
2.53.ac_c$4$(not in LMFDB)
2.53.a_aea$8$(not in LMFDB)
2.53.a_ea$8$(not in LMFDB)