Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 14 x + 89 x^{2} )( 1 + 18 x + 89 x^{2} )$ |
| $1 + 4 x - 74 x^{2} + 356 x^{3} + 7921 x^{4}$ | |
| Frobenius angles: | $\pm0.233878122877$, $\pm0.903075820349$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $380$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
This isogeny class is not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $8208$ | $61461504$ | $498407760144$ | $3937219029319680$ | $31182479396485317648$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $94$ | $7758$ | $706990$ | $62752286$ | $5584195454$ | $496982070126$ | $44231322267086$ | $3936588785898046$ | $350356401497526430$ | $31181719935664488078$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 380 curves (of which all are hyperelliptic):
- $y^2=12 x^6+35 x^5+16 x^4+82 x^3+2 x^2+50 x+28$
- $y^2=36 x^6+30 x^5+76 x^4+54 x^3+83 x^2+50 x+60$
- $y^2=47 x^6+63 x^5+54 x^4+39 x^3+62 x^2+10 x+24$
- $y^2=36 x^6+84 x^5+70 x^4+3 x^3+30 x^2+87 x+20$
- $y^2=85 x^6+79 x^5+43 x^4+86 x^3+43 x^2+79 x+85$
- $y^2=55 x^6+8 x^5+41 x^4+74 x^3+70 x^2+41 x$
- $y^2=78 x^6+x^5+66 x^4+16 x^3+6 x^2+78 x+22$
- $y^2=88 x^6+11 x^5+40 x^4+15 x^3+19 x^2+60 x+45$
- $y^2=18 x^6+54 x^5+58 x^4+13 x^3+34 x^2+6 x+62$
- $y^2=7 x^6+56 x^5+55 x^4+80 x^3+80 x^2+4 x+19$
- $y^2=22 x^6+83 x^5+81 x^4+31 x^3+50 x^2+10 x+64$
- $y^2=65 x^6+81 x^5+21 x^4+65 x^3+11 x^2+64 x+37$
- $y^2=3 x^6+76 x^5+72 x^4+28 x^3+69 x^2+42 x+18$
- $y^2=14 x^6+x^5+60 x^4+27 x^3+46 x^2+22 x+84$
- $y^2=83 x^6+4 x^5+78 x^4+79 x^3+38 x^2+40 x+9$
- $y^2=45 x^6+33 x^5+52 x^4+16 x^3+3 x^2+14 x+81$
- $y^2=49 x^6+12 x^5+24 x^4+28 x^3+72 x^2+50 x+28$
- $y^2=87 x^6+70 x^5+9 x^4+85 x^3+17 x^2+23 x+81$
- $y^2=39 x^6+68 x^5+6 x^4+79 x^3+16 x^2+25 x$
- $y^2=54 x^6+62 x^5+67 x^4+25 x^3+79 x^2+29 x+72$
- and 360 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{89}$.
Endomorphism algebra over $\F_{89}$| The isogeny class factors as 1.89.ao $\times$ 1.89.s and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
Base change
This is a primitive isogeny class.
Twists
Below is a list of all twists of this isogeny class.
| Twist | Extension degree | Common base change |
|---|---|---|
| 2.89.abg_qo | $2$ | (not in LMFDB) |
| 2.89.ae_acw | $2$ | (not in LMFDB) |
| 2.89.bg_qo | $2$ | (not in LMFDB) |