Properties

Label 2.73.ae_fu
Base field $\F_{73}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple no
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{73}$
Dimension:  $2$
L-polynomial:  $( 1 - 2 x + 73 x^{2} )^{2}$
  $1 - 4 x + 150 x^{2} - 292 x^{3} + 5329 x^{4}$
Frobenius angles:  $\pm0.462659059226$, $\pm0.462659059226$
Angle rank:  $1$ (numerical)
Jacobians:  $112$
Cyclic group of points:    no
Non-cyclic primes:   $2, 3$

This isogeny class is not 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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5184$ $29942784$ $151669744704$ $805920331677696$ $4297416862481100864$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $70$ $5614$ $389878$ $28379230$ $2072970790$ $151335412558$ $11047408250326$ $806460024758974$ $58871585863618054$ $4297625832915120814$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 112 curves (of which all are hyperelliptic):

  • $y^2=31 x^6+33 x^5+4 x^4+66 x^3+57 x^2+51 x+70$
  • $y^2=54 x^6+30 x^4+30 x^2+54$
  • $y^2=71 x^6+60 x^5+39 x^4+29 x^3+55 x^2+62 x+43$
  • $y^2=52 x^6+15 x^5+42 x^4+59 x^3+4 x^2+22 x+41$
  • $y^2=7 x^6+20 x^5+52 x^4+71 x^3+24 x^2+45 x+49$
  • $y^2=12 x^6+21 x^4+21 x^2+12$
  • $y^2=21 x^6+66 x^5+41 x^4+32 x^3+43 x^2+61 x+33$
  • $y^2=48 x^6+65 x^5+69 x^4+5 x^3+16 x^2+69 x+9$
  • $y^2=48 x^6+25 x^5+3 x^4+27 x^3+2 x^2+64 x+19$
  • $y^2=49 x^6+56 x^5+71 x^4+28 x^3+23 x^2+33 x+1$
  • $y^2=31 x^6+67 x^5+26 x^4+54 x^3+17 x^2+71 x+31$
  • $y^2=42 x^6+2 x^5+19 x^4+12 x^3+47 x^2+21 x+61$
  • $y^2=72 x^6+19 x^5+55 x^4+55 x^3+55 x^2+19 x+72$
  • $y^2=48 x^6+27 x^5+19 x^4+58 x^3+19 x^2+27 x+48$
  • $y^2=23 x^6+48 x^5+6 x^4+66 x^3+19 x^2+19 x+23$
  • $y^2=66 x^6+14 x^5+38 x^4+43 x^3+38 x^2+14 x+66$
  • $y^2=21 x^6+50 x^5+46 x^4+33 x^3+24 x^2+34 x+9$
  • $y^2=62 x^6+12 x^5+10 x^4+55 x^3+45 x^2+24 x+47$
  • $y^2=26 x^6+21 x^5+46 x^4+58 x^3+23 x^2+60 x+58$
  • $y^2=48 x^5+33 x^4+36 x^3+17 x^2+34 x+58$
  • and 92 more

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{73}$
The isogeny class factors as 1.73.ac 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-2}) \)$)$

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.73.a_fm$2$(not in LMFDB)
2.73.e_fu$2$(not in LMFDB)
2.73.c_acr$3$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.73.a_fm$2$(not in LMFDB)
2.73.e_fu$2$(not in LMFDB)
2.73.c_acr$3$(not in LMFDB)
2.73.a_afm$4$(not in LMFDB)
2.73.ac_acr$6$(not in LMFDB)
2.73.ay_lc$8$(not in LMFDB)
2.73.y_lc$8$(not in LMFDB)