Properties

Label 2.73.d_fc
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:  $1 + 3 x + 132 x^{2} + 219 x^{3} + 5329 x^{4}$
Frobenius angles:  $\pm0.452676811798$, $\pm0.604921750591$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-1094 -6 \sqrt{65}})\)
Galois group:  $D_{4}$
Jacobians:  $198$
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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5684$ $29784160$ $151138378496$ $806133904777600$ $4297686285241482644$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $77$ $5585$ $388514$ $28386753$ $2073100757$ $151334406830$ $11047399329869$ $806460120468673$ $58871586320574482$ $4297625825955135425$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 198 curves (of which all are hyperelliptic):

  • $y^2=44 x^6+25 x^5+28 x^4+29 x^3+62 x^2+32 x+38$
  • $y^2=48 x^6+34 x^5+42 x^4+16 x^3+48 x^2+20 x+18$
  • $y^2=61 x^6+31 x^5+50 x^4+44 x^3+69 x^2+42 x+44$
  • $y^2=25 x^6+23 x^5+40 x^4+13 x^3+19 x^2+4 x+61$
  • $y^2=26 x^6+10 x^5+10 x^4+22 x^3+63 x^2+6 x+72$
  • $y^2=38 x^6+55 x^5+21 x^4+21 x^3+37 x^2+41 x+56$
  • $y^2=57 x^6+58 x^5+19 x^4+49 x^3+12 x^2+42 x+19$
  • $y^2=52 x^6+52 x^5+7 x^4+36 x^3+44 x^2+67 x+44$
  • $y^2=52 x^6+50 x^5+16 x^4+51 x^3+20 x^2+42 x+14$
  • $y^2=53 x^6+13 x^5+50 x^4+47 x^3+58 x^2+59 x+49$
  • $y^2=35 x^6+14 x^5+39 x^4+51 x^3+9 x^2+18 x+36$
  • $y^2=9 x^6+13 x^5+70 x^4+7 x^3+47 x^2+45 x+50$
  • $y^2=23 x^6+28 x^5+13 x^4+56 x^3+69 x^2+9 x+8$
  • $y^2=68 x^6+5 x^5+72 x^4+14 x^3+38 x^2+35 x+22$
  • $y^2=41 x^6+47 x^5+46 x^4+46 x^3+13 x^2+59 x+34$
  • $y^2=17 x^6+12 x^5+6 x^4+21 x^3+13 x^2+2 x+8$
  • $y^2=63 x^6+62 x^5+43 x^4+38 x^3+42 x^2+51 x+57$
  • $y^2=64 x^6+52 x^5+5 x^4+28 x^3+55 x^2+62 x+41$
  • $y^2=5 x^6+61 x^5+12 x^4+72 x^3+31 x^2+5 x+49$
  • $y^2=43 x^6+22 x^5+52 x^4+26 x^3+31 x^2+19 x+25$
  • and 178 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 \(\Q(\sqrt{-1094 -6 \sqrt{65}})\).

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.ad_fc$2$(not in LMFDB)