Properties

Label 2.73.i_fu
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:  $1 + 8 x + 150 x^{2} + 584 x^{3} + 5329 x^{4}$
Frobenius angles:  $\pm0.509984179142$, $\pm0.643889497353$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-60 +29 \sqrt{3}})\)
Galois group:  $D_{4}$
Jacobians:  $140$
Isomorphism classes:  220
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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $6072$ $29679936$ $150815419128$ $806231005172736$ $4297800984521907192$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $82$ $5566$ $387682$ $28390174$ $2073156082$ $151334283166$ $11047397222146$ $806460087391678$ $58871586455377810$ $4297625832856366846$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 140 curves (of which all are hyperelliptic):

  • $y^2=8 x^6+56 x^5+21 x^4+70 x^3+22 x+6$
  • $y^2=34 x^5+46 x^4+54 x^3+72 x^2+48 x+54$
  • $y^2=15 x^6+61 x^5+68 x^4+22 x^3+43 x^2+x+35$
  • $y^2=18 x^6+68 x^5+49 x^4+65 x^3+24 x^2+19 x+3$
  • $y^2=22 x^6+51 x^5+67 x^4+21 x^3+52 x^2+38 x+68$
  • $y^2=10 x^6+54 x^5+9 x^4+5 x^3+19 x^2+12 x+4$
  • $y^2=49 x^6+19 x^5+32 x^4+47 x^3+63 x^2+70 x+66$
  • $y^2=25 x^6+13 x^5+62 x^4+33 x^3+60 x^2+12 x+70$
  • $y^2=55 x^6+27 x^5+63 x^4+65 x^3+38 x^2+67 x+12$
  • $y^2=5 x^6+23 x^5+35 x^4+62 x^3+15 x^2+41 x+41$
  • $y^2=14 x^6+38 x^5+24 x^4+57 x^3+72 x^2+37 x+59$
  • $y^2=64 x^6+18 x^5+20 x^4+52 x^3+26 x^2+62 x+16$
  • $y^2=18 x^6+29 x^5+72 x^4+19 x^3+25 x^2+10 x+49$
  • $y^2=11 x^6+10 x^5+32 x^4+50 x^3+26 x^2+60 x+49$
  • $y^2=70 x^6+14 x^5+38 x^4+69 x^3+48 x^2+19 x+32$
  • $y^2=5 x^6+24 x^5+33 x^4+7 x^3+69 x^2+54 x+55$
  • $y^2=40 x^6+24 x^5+68 x^4+38 x^3+16 x^2+26 x+67$
  • $y^2=7 x^6+31 x^5+50 x^4+32 x^3+64 x^2+34 x+22$
  • $y^2=49 x^6+19 x^5+16 x^4+47 x^3+37 x^2+50 x+41$
  • $y^2=37 x^6+60 x^5+15 x^4+56 x^3+61 x^2+58 x+51$
  • and 120 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 \(\Q(\sqrt{-60 +29 \sqrt{3}})\).

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_fu$2$(not in LMFDB)