Properties

Label 2.53.b_m
Base field $\F_{53}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple yes
Geometrically simple yes
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{53}$
Dimension:  $2$
L-polynomial:  $1 + x + 12 x^{2} + 53 x^{3} + 2809 x^{4}$
Frobenius angles:  $\pm0.282059741698$, $\pm0.747309618693$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-470 +2 \sqrt{377}})\)
Galois group:  $D_{4}$
Jacobians:  $120$
Isomorphism classes:  240
Cyclic group of points:    no
Non-cyclic primes:   $2$

This isogeny class is simple and 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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $2876$ $7960768$ $22182737552$ $62344818278144$ $174880654718803276$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $55$ $2833$ $149002$ $7901265$ $418179195$ $22164176854$ $1174710599887$ $62259663737025$ $3299763680506402$ $174887471143149513$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 120 curves (of which all are hyperelliptic):

  • $y^2=25 x^6+27 x^5+37 x^4+52 x^3+17 x^2+44 x+4$
  • $y^2=33 x^6+5 x^5+32 x^4+49 x^3+50 x^2+15 x+47$
  • $y^2=29 x^5+27 x^4+31 x^3+3 x^2+12 x+26$
  • $y^2=26 x^6+25 x^5+36 x^4+12 x^3+5 x^2+52 x+37$
  • $y^2=29 x^6+40 x^4+28 x^3+49 x^2+52 x+38$
  • $y^2=7 x^6+43 x^5+18 x^4+41 x^3+48 x^2+17 x+40$
  • $y^2=33 x^6+4 x^5+6 x^4+37 x^3+38 x^2+36 x+43$
  • $y^2=23 x^6+42 x^5+37 x^4+29 x^3+32 x^2+28 x+31$
  • $y^2=48 x^6+38 x^5+39 x^4+3 x^3+17 x^2+45 x+7$
  • $y^2=11 x^6+37 x^5+50 x^4+50 x^3+31 x^2+x+15$
  • $y^2=28 x^6+x^5+37 x^4+43 x^3+49 x^2+32 x+16$
  • $y^2=50 x^6+7 x^5+33 x^4+21 x^3+38 x^2+47$
  • $y^2=27 x^6+37 x^5+8 x^4+3 x^3+52 x^2+20 x+46$
  • $y^2=16 x^6+6 x^5+28 x^4+39 x^3+33 x^2+6 x+38$
  • $y^2=9 x^6+39 x^5+46 x^4+7 x^3+17 x^2+5 x+44$
  • $y^2=49 x^6+36 x^5+15 x^4+47 x^3+50 x^2+24 x+21$
  • $y^2=32 x^6+40 x^5+22 x^4+37 x^3+22 x^2+31 x+33$
  • $y^2=45 x^6+14 x^5+24 x^4+27 x^3+21 x^2+35 x+7$
  • $y^2=51 x^6+46 x^5+25 x^4+51 x^3+32 x^2+16 x+3$
  • $y^2=22 x^6+31 x^5+x^4+4 x^3+43 x^2+10 x+51$
  • and 100 more

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{53}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-470 +2 \sqrt{377}})\).

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.ab_m$2$(not in LMFDB)