Properties

Label 2.67.a_es
Base field $\F_{67}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple yes
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{67}$
Dimension:  $2$
L-polynomial:  $1 + 122 x^{2} + 4489 x^{4}$
Frobenius angles:  $\pm0.432131395335$, $\pm0.567868604665$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(\zeta_{12})\)
Galois group:  $C_2^2$
Jacobians:  $198$
Isomorphism classes:  162
Cyclic group of points:    no
Non-cyclic primes:   $2$

This isogeny class is simple but not 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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $4612$ $21270544$ $90458555044$ $405829727686656$ $1822837803114318532$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $68$ $4734$ $300764$ $20139310$ $1350125108$ $90458727918$ $6060711605324$ $406067688399454$ $27206534396294948$ $1822837801676875614$

Jacobians and polarizations

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

  • $y^2=31 x^6+59 x^5+18 x^4+35 x^3+57 x^2+37 x+44$
  • $y^2=62 x^6+51 x^5+36 x^4+3 x^3+47 x^2+7 x+21$
  • $y^2=49 x^6+59 x^5+4 x^4+37 x^3+27 x^2+66 x+50$
  • $y^2=31 x^6+51 x^5+8 x^4+7 x^3+54 x^2+65 x+33$
  • $y^2=27 x^6+7 x^5+16 x^4+56 x^3+31 x^2+11 x+6$
  • $y^2=54 x^6+14 x^5+32 x^4+45 x^3+62 x^2+22 x+12$
  • $y^2=5 x^6+5 x^5+11 x^4+27 x^3+15 x^2+32 x+1$
  • $y^2=52 x^6+60 x^5+43 x^4+29 x^3+4 x^2+63 x+65$
  • $y^2=37 x^6+53 x^5+19 x^4+58 x^3+8 x^2+59 x+63$
  • $y^2=15 x^6+31 x^5+23 x^4+4 x^3+26 x^2+8 x+34$
  • $y^2=30 x^6+62 x^5+46 x^4+8 x^3+52 x^2+16 x+1$
  • $y^2=16 x^6+49 x^5+47 x^4+12 x^3+15 x^2+4 x+11$
  • $y^2=32 x^6+31 x^5+27 x^4+24 x^3+30 x^2+8 x+22$
  • $y^2=42 x^6+35 x^5+63 x^4+65 x^3+37 x^2+10 x+36$
  • $y^2=66 x^6+34 x^5+27 x^4+53 x^3+63 x^2+57 x+64$
  • $y^2=65 x^6+x^5+54 x^4+39 x^3+59 x^2+47 x+61$
  • $y^2=27 x^6+15 x^5+2 x^4+39 x^3+63 x^2+29 x+11$
  • $y^2=54 x^6+30 x^5+4 x^4+11 x^3+59 x^2+58 x+22$
  • $y^2=26 x^6+23 x^5+24 x^4+37 x^3+54 x^2+13 x+40$
  • $y^2=52 x^6+46 x^5+48 x^4+7 x^3+41 x^2+26 x+13$
  • and 178 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{67^{2}}$.

Endomorphism algebra over $\F_{67}$
The endomorphism algebra of this simple isogeny class is \(\Q(\zeta_{12})\).
Endomorphism algebra over $\overline{\F}_{67}$
The base change of $A$ to $\F_{67^{2}}$ is 1.4489.es 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-3}) \)$)$

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.67.a_aef$3$(not in LMFDB)
2.67.a_an$3$(not in LMFDB)
2.67.abg_pa$4$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.67.a_aef$3$(not in LMFDB)
2.67.a_an$3$(not in LMFDB)
2.67.abg_pa$4$(not in LMFDB)
2.67.a_aes$4$(not in LMFDB)
2.67.bg_pa$4$(not in LMFDB)
2.67.abb_ly$12$(not in LMFDB)
2.67.aw_jv$12$(not in LMFDB)
2.67.av_ig$12$(not in LMFDB)
2.67.aq_hh$12$(not in LMFDB)
2.67.al_cc$12$(not in LMFDB)
2.67.ak_gd$12$(not in LMFDB)
2.67.ag_db$12$(not in LMFDB)
2.67.af_abq$12$(not in LMFDB)
2.67.a_n$12$(not in LMFDB)
2.67.a_ef$12$(not in LMFDB)
2.67.f_abq$12$(not in LMFDB)
2.67.g_db$12$(not in LMFDB)
2.67.k_gd$12$(not in LMFDB)
2.67.l_cc$12$(not in LMFDB)
2.67.q_hh$12$(not in LMFDB)
2.67.v_ig$12$(not in LMFDB)
2.67.w_jv$12$(not in LMFDB)
2.67.bb_ly$12$(not in LMFDB)