Properties

Label 2.53.a_cg
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:  $1 + 58 x^{2} + 2809 x^{4}$
Frobenius angles:  $\pm0.342147405617$, $\pm0.657852594383$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(\sqrt{3}, \sqrt{-41})\)
Galois group:  $C_2^2$
Jacobians:  $346$
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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $2868$ $8225424$ $22164067476$ $62295281565696$ $174887470569761268$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $54$ $2926$ $148878$ $7894990$ $418195494$ $22163773822$ $1174711139838$ $62259711812254$ $3299763591802134$ $174887470774009486$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 346 curves (of which all are hyperelliptic):

  • $y^2=52 x^6+46 x^5+22 x^4+21 x^3+50 x^2+46 x+6$
  • $y^2=51 x^6+39 x^5+44 x^4+42 x^3+47 x^2+39 x+12$
  • $y^2=36 x^6+22 x^5+44 x^4+18 x^3+28 x^2+14 x+11$
  • $y^2=19 x^6+44 x^5+35 x^4+36 x^3+3 x^2+28 x+22$
  • $y^2=7 x^6+38 x^5+17 x^4+39 x^3+27 x^2+28 x+31$
  • $y^2=16 x^6+9 x^5+29 x^4+29 x^3+32 x^2+17 x+10$
  • $y^2=32 x^6+18 x^5+5 x^4+5 x^3+11 x^2+34 x+20$
  • $y^2=8 x^6+37 x^5+27 x^4+30 x^3+28 x^2+12 x+28$
  • $y^2=50 x^6+9 x^5+26 x^4+28 x^3+32 x^2+3 x+40$
  • $y^2=26 x^6+2 x^5+31 x^4+52 x^3+37 x^2+5 x+28$
  • $y^2=16 x^6+22 x^5+43 x^4+12 x^3+21 x^2+26 x+21$
  • $y^2=46 x^6+49 x^5+18 x^4+31 x^3+44 x^2+52 x+34$
  • $y^2=46 x^6+48 x^5+20 x^4+50 x^3+12 x^2+3 x+7$
  • $y^2=39 x^6+43 x^5+40 x^4+47 x^3+24 x^2+6 x+14$
  • $y^2=13 x^6+27 x^5+7 x^4+29 x^3+4 x^2+15 x+25$
  • $y^2=26 x^6+x^5+14 x^4+5 x^3+8 x^2+30 x+50$
  • $y^2=12 x^6+41 x^5+33 x^4+4 x^3+10 x^2+9 x+17$
  • $y^2=24 x^6+29 x^5+13 x^4+8 x^3+20 x^2+18 x+34$
  • $y^2=13 x^6+43 x^5+27 x^4+14 x^3+36 x^2+47 x+38$
  • $y^2=26 x^6+33 x^5+x^4+28 x^3+19 x^2+41 x+23$
  • and 326 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{53^{2}}$.

Endomorphism algebra over $\F_{53}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{3}, \sqrt{-41})\).
Endomorphism algebra over $\overline{\F}_{53}$
The base change of $A$ to $\F_{53^{2}}$ is 1.2809.cg 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-123}) \)$)$

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.53.a_acg$4$(not in LMFDB)
2.53.am_dx$12$(not in LMFDB)
2.53.m_dx$12$(not in LMFDB)