Properties

Label 2.61.ae_s
Base field $\F_{61}$
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:  $\F_{61}$
Dimension:  $2$
L-polynomial:  $1 - 4 x + 18 x^{2} - 244 x^{3} + 3721 x^{4}$
Frobenius angles:  $\pm0.208342387637$, $\pm0.680541461352$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-32 -14 \sqrt{3}})\)
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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $3492$ $13926096$ $51388834212$ $191862832628736$ $713406357055793412$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $58$ $3742$ $226402$ $13857070$ $844671418$ $51520256782$ $3142745911426$ $191707303964254$ $11694145693148602$ $713342911414648702$

Jacobians and polarizations

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

  • $y^2=6 x^6+46 x^5+54 x^4+24 x^3+58 x^2+47 x+8$
  • $y^2=50 x^6+49 x^5+39 x^4+15 x^3+12 x^2+19 x+22$
  • $y^2=30 x^6+10 x^5+21 x^4+55 x^3+53 x^2+41 x+14$
  • $y^2=15 x^6+5 x^5+57 x^4+10 x^3+3 x^2+47 x+5$
  • $y^2=56 x^6+50 x^5+13 x^4+3 x^3+23 x^2+41 x+51$
  • $y^2=23 x^6+11 x^5+27 x^4+50 x^3+54 x^2+41 x+35$
  • $y^2=12 x^6+60 x^5+45 x^4+51 x^3+8 x^2+16 x+9$
  • $y^2=21 x^6+33 x^5+39 x^4+34 x^3+31 x^2+8 x+25$
  • $y^2=12 x^6+49 x^5+46 x^4+33 x^3+33 x^2+22 x+32$
  • $y^2=44 x^6+36 x^5+5 x^4+47 x^3+46 x^2+5 x+56$
  • $y^2=42 x^6+10 x^5+18 x^4+18 x^3+17 x^2+6 x+45$
  • $y^2=12 x^6+18 x^5+17 x^4+53 x^3+27 x^2+44 x+50$
  • $y^2=54 x^5+44 x^4+57 x^3+12 x^2+11 x+25$
  • $y^2=39 x^6+42 x^5+36 x^4+50 x^3+14 x^2+25 x+18$
  • $y^2=29 x^6+26 x^5+38 x^4+4 x^3+27 x^2+37 x+52$
  • $y^2=29 x^6+49 x^5+59 x^4+9 x^3+48 x^2+26 x+41$
  • $y^2=45 x^6+11 x^5+27 x^4+24 x^3+14 x^2+49 x+43$
  • $y^2=26 x^6+57 x^5+33 x^4+58 x^3+52 x^2+17$
  • $y^2=38 x^6+31 x^5+41 x^4+58 x^3+40 x^2+52 x+3$
  • $y^2=51 x^6+58 x^5+60 x^4+44 x^3+55 x^2+11 x+12$
  • and 358 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{61}$.

Endomorphism algebra over $\F_{61}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-32 -14 \sqrt{3}})\).

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.61.e_s$2$(not in LMFDB)