Properties

Label 2.73.i_ac
Base field $\F_{73}$
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:  $\F_{73}$
Dimension:  $2$
L-polynomial:  $1 + 8 x - 2 x^{2} + 584 x^{3} + 5329 x^{4}$
Frobenius angles:  $\pm0.327663152701$, $\pm0.942116220410$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-14 +2 \sqrt{41}})\)
Galois group:  $D_{4}$
Jacobians:  $174$
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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5920$ $28037120$ $152235742240$ $806403645440000$ $4297662334349677600$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $82$ $5262$ $391330$ $28396254$ $2073089202$ $151333093614$ $11047396456066$ $806460106443966$ $58871587155392530$ $4297625833396501582$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 174 curves (of which all are hyperelliptic):

  • $y^2=44 x^6+71 x^5+6 x^4+27 x^3+54 x+65$
  • $y^2=51 x^6+6 x^5+52 x^4+71 x^3+43 x^2+36 x+59$
  • $y^2=37 x^6+7 x^5+59 x^4+64 x^3+67 x^2+56 x+42$
  • $y^2=39 x^6+54 x^5+32 x^4+14 x^3+17 x^2+37 x+35$
  • $y^2=36 x^6+31 x^5+43 x^4+36 x^3+46 x^2+66 x+37$
  • $y^2=39 x^6+39 x^5+50 x^4+9 x^3+5 x^2+49 x+62$
  • $y^2=63 x^6+71 x^5+44 x^4+4 x^3+15 x^2+67 x+31$
  • $y^2=41 x^6+37 x^5+61 x^4+65 x^3+11 x^2+27 x+6$
  • $y^2=2 x^6+29 x^5+57 x^4+5 x^3+31 x^2+43 x+36$
  • $y^2=25 x^6+57 x^5+60 x^4+13 x^3+28 x^2+65 x+39$
  • $y^2=62 x^6+51 x^5+48 x^4+35 x^3+66 x+48$
  • $y^2=34 x^6+23 x^5+18 x^4+68 x^3+34 x^2+7 x+63$
  • $y^2=4 x^6+18 x^5+41 x^4+42 x^3+35 x^2+51 x+12$
  • $y^2=62 x^6+69 x^5+24 x^4+48 x^3+64 x^2+57 x+57$
  • $y^2=33 x^6+52 x^5+4 x^4+61 x^3+28 x^2+5 x+52$
  • $y^2=6 x^6+60 x^5+29 x^4+39 x^3+48 x^2+10 x+26$
  • $y^2=52 x^6+20 x^5+39 x^4+65 x^3+44 x^2+42 x+30$
  • $y^2=31 x^6+41 x^5+72 x^4+39 x^3+3 x^2+42 x+41$
  • $y^2=65 x^6+12 x^5+71 x^4+66 x^3+28 x^2+50 x+22$
  • $y^2=26 x^6+2 x^5+33 x^4+46 x^3+10 x^2+27 x+56$
  • and 154 more

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{73}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-14 +2 \sqrt{41}})\).

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.73.ai_ac$2$(not in LMFDB)