Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 16 x + 89 x^{2} )( 1 + 16 x + 89 x^{2} )$ |
| $1 - 78 x^{2} + 7921 x^{4}$ | |
| Frobenius angles: | $\pm0.177807684489$, $\pm0.822192315511$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $351$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7844$ | $61528336$ | $496982669924$ | $3937813504000000$ | $31181719921404167204$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $90$ | $7766$ | $704970$ | $62761758$ | $5584059450$ | $496984048886$ | $44231334895530$ | $3936588866233918$ | $350356403707485210$ | $31181719912842150806$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 351 curves (of which all are hyperelliptic):
- $y^2=39 x^6+61 x^5+17 x^4+23 x^3+53 x^2+53 x+28$
- $y^2=28 x^6+5 x^5+51 x^4+69 x^3+70 x^2+70 x+84$
- $y^2=57 x^6+28 x^5+76 x^4+9 x^3+73 x^2+54 x+15$
- $y^2=68 x^6+40 x^5+72 x^4+x^3+10 x^2+24 x+38$
- $y^2=26 x^6+31 x^5+38 x^4+3 x^3+30 x^2+72 x+25$
- $y^2=84 x^6+18 x^5+34 x^4+35 x^3+54 x^2+52 x+41$
- $y^2=74 x^6+54 x^5+13 x^4+16 x^3+73 x^2+67 x+34$
- $y^2=46 x^6+35 x^5+7 x^4+88 x^3+64 x^2+81 x+82$
- $y^2=49 x^6+16 x^5+21 x^4+86 x^3+14 x^2+65 x+68$
- $y^2=21 x^6+61 x^5+88 x^4+36 x^3+80 x^2+46 x+59$
- $y^2=63 x^6+5 x^5+86 x^4+19 x^3+62 x^2+49 x+88$
- $y^2=18 x^6+16 x^5+22 x^4+41 x^3+63 x^2+81 x+76$
- $y^2=63 x^6+58 x^5+4 x^4+66 x^3+50 x^2+25 x+49$
- $y^2=32 x^6+52 x^5+33 x^4+44 x^3+77 x^2+53$
- $y^2=60 x^6+63 x^5+x^4+83 x^3+45 x^2+72 x+54$
- $y^2=2 x^6+11 x^5+3 x^4+71 x^3+46 x^2+38 x+73$
- $y^2=24 x^6+15 x^5+67 x^4+62 x^3+29 x^2+12 x+37$
- $y^2=72 x^6+45 x^5+23 x^4+8 x^3+87 x^2+36 x+22$
- $y^2=47 x^6+40 x^5+52 x^4+85 x^3+67 x^2+23 x+18$
- $y^2=52 x^6+31 x^5+67 x^4+77 x^3+23 x^2+69 x+54$
- and 331 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{89^{2}}$.
Endomorphism algebra over $\F_{89}$| The isogeny class factors as 1.89.aq $\times$ 1.89.q and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
| The base change of $A$ to $\F_{89^{2}}$ is 1.7921.ada 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-1}) \)$)$ |
Base change
This is a primitive isogeny class.