Properties

Label 2.67.e_du
Base field $\F_{67}$
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:  $\F_{67}$
Dimension:  $2$
L-polynomial:  $1 + 4 x + 98 x^{2} + 268 x^{3} + 4489 x^{4}$
Frobenius angles:  $\pm0.414903894831$, $\pm0.669800981057$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-24 +7 \sqrt{10}})\)
Galois group:  $D_{4}$
Jacobians:  $378$
Cyclic group of points:    no
Non-cyclic primes:   $2, 3$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $4860$ $20975760$ $90365484060$ $406077289113600$ $1822786613508901500$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $72$ $4670$ $300456$ $20151598$ $1350087192$ $90457761710$ $6060719057976$ $406067716575838$ $27206533846346472$ $1822837803715608350$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 378 curves (of which all are hyperelliptic):

  • $y^2=64 x^6+29 x^5+43 x^4+56 x^3+65 x^2+29 x+57$
  • $y^2=12 x^6+35 x^5+49 x^4+38 x^3+22 x^2+59 x+19$
  • $y^2=2 x^6+64 x^5+8 x^4+18 x^3+59 x^2+14 x+44$
  • $y^2=33 x^6+x^5+19 x^4+32 x^3+43 x^2+57 x+3$
  • $y^2=19 x^6+21 x^5+49 x^4+19 x^3+13 x^2+34 x+8$
  • $y^2=31 x^6+45 x^5+27 x^4+33 x^3+26 x^2+30 x+19$
  • $y^2=50 x^6+12 x^5+2 x^4+16 x^3+48 x^2+20 x+41$
  • $y^2=28 x^6+32 x^5+2 x^4+3 x^3+22 x^2+2 x+62$
  • $y^2=51 x^6+14 x^5+56 x^4+24 x^3+8 x^2+13 x+59$
  • $y^2=27 x^6+49 x^5+22 x^4+57 x^3+36 x^2+50 x+19$
  • $y^2=60 x^6+51 x^5+47 x^4+2 x^3+29 x^2+16 x+3$
  • $y^2=64 x^6+45 x^5+36 x^4+56 x^3+25 x^2+40 x+12$
  • $y^2=49 x^6+22 x^5+42 x^4+35 x^3+57 x^2+57 x+32$
  • $y^2=40 x^6+31 x^5+x^4+46 x^3+4 x^2+23 x+37$
  • $y^2=51 x^6+26 x^5+22 x^4+16 x^3+34 x^2+21 x+53$
  • $y^2=8 x^6+46 x^5+12 x^4+38 x^3+66 x^2+10 x+35$
  • $y^2=21 x^6+19 x^5+6 x^4+8 x^3+29 x^2+36 x+13$
  • $y^2=23 x^6+24 x^5+56 x^4+30 x^3+36 x^2+12 x+62$
  • $y^2=34 x^6+45 x^5+20 x^4+37 x^3+52 x^2+48 x+59$
  • $y^2=10 x^6+39 x^5+29 x^4+19 x^3+31 x^2+65 x+18$
  • and 358 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{67}$.

Endomorphism algebra over $\F_{67}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-24 +7 \sqrt{10}})\).

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.67.ae_du$2$(not in LMFDB)