Properties

Label 2.73.l_bw
Base field $\F_{73}$
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:  $\F_{73}$
Dimension:  $2$
L-polynomial:  $1 + 11 x + 48 x^{2} + 803 x^{3} + 5329 x^{4}$
Frobenius angles:  $\pm0.389279142100$, $\pm0.944054191233$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(\sqrt{-3}, \sqrt{-19})\)
Galois group:  $C_2^2$
Jacobians:  $173$
Isomorphism classes:  165
Cyclic group of points:    no
Non-cyclic primes:   $2, 3$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $6192$ $28260288$ $152174889216$ $806175244594944$ $4297560176529101232$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $85$ $5305$ $391174$ $28388209$ $2073039925$ $151333458190$ $11047405055485$ $806460135758689$ $58871586697559062$ $4297625826560340025$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 173 curves (of which all are hyperelliptic):

  • $y^2=29 x^6+50 x^5+55 x^4+38 x^3+42 x^2+21 x+43$
  • $y^2=54 x^6+63 x^5+65 x^4+43 x^3+63 x^2+26 x+38$
  • $y^2=71 x^6+41 x^5+60 x^4+23 x^3+10 x^2+32 x+58$
  • $y^2=17 x^6+x^5+31 x^4+4 x^3+40 x^2+21 x+3$
  • $y^2=15 x^6+12 x^5+8 x^4+55 x^3+70 x^2+12 x+10$
  • $y^2=58 x^6+21 x^5+45 x^4+64 x^3+x^2+14 x+62$
  • $y^2=43 x^6+58 x^5+16 x^4+34 x^3+44 x^2+71 x+24$
  • $y^2=35 x^6+44 x^5+25 x^4+9 x^3+32 x^2+37 x+8$
  • $y^2=28 x^6+x^5+31 x^4+x^3+51 x^2+33 x+49$
  • $y^2=50 x^5+43 x^4+57 x^3+49 x^2+57 x+18$
  • $y^2=72 x^6+21 x^5+69 x^4+40 x^3+49 x^2+17 x+21$
  • $y^2=31 x^6+21 x^5+29 x^4+20 x^3+44 x^2+24 x+26$
  • $y^2=9 x^6+15 x^5+62 x^4+71 x^3+34 x^2+48 x+56$
  • $y^2=71 x^6+37 x^5+37 x^4+36 x^3+54 x^2+35 x+9$
  • $y^2=51 x^6+54 x^5+40 x^4+66 x^3+19 x^2+2 x+47$
  • $y^2=5 x^6+3 x^5+16 x^4+65 x^3+34 x^2+70 x+71$
  • $y^2=8 x^6+25 x^5+32 x^4+17 x^3+66 x^2+39 x+61$
  • $y^2=44 x^6+14 x^5+26 x^4+34 x^3+61 x^2+65 x+60$
  • $y^2=25 x^6+21 x^5+3 x^4+6 x^3+15 x^2+44 x+71$
  • $y^2=36 x^6+32 x^5+3 x^4+20 x^3+8 x^2+6 x+34$
  • and 153 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{73^{3}}$.

Endomorphism algebra over $\F_{73}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-3}, \sqrt{-19})\).
Endomorphism algebra over $\overline{\F}_{73}$
The base change of $A$ to $\F_{73^{3}}$ is 1.389017.bpm 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-19}) \)$)$

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.al_bw$2$(not in LMFDB)
2.73.aw_kh$3$(not in LMFDB)
2.73.a_z$6$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.73.al_bw$2$(not in LMFDB)
2.73.aw_kh$3$(not in LMFDB)
2.73.a_z$6$(not in LMFDB)
2.73.w_kh$6$(not in LMFDB)
2.73.a_az$12$(not in LMFDB)