Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + x + 72 x^{2} + 89 x^{3} + 7921 x^{4}$ |
| Frobenius angles: | $\pm0.326002566082$, $\pm0.694146852346$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.1122476.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $350$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $8084$ | $63895936$ | $497016640016$ | $3937922126288384$ | $31181465089430547124$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $91$ | $8065$ | $705022$ | $62763489$ | $5584013811$ | $496978669486$ | $44231338500139$ | $3936588826608129$ | $350356404021865198$ | $31181719948590469425$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 350 curves (of which all are hyperelliptic):
- $y^2=71 x^6+7 x^5+63 x^4+40 x^3+63 x^2+80 x+63$
- $y^2=11 x^6+73 x^5+57 x^4+79 x^3+20 x^2+37 x+72$
- $y^2=38 x^6+28 x^5+87 x^4+55 x^3+82 x^2+62 x+84$
- $y^2=74 x^6+74 x^5+49 x^4+43 x^3+10 x^2+12 x+23$
- $y^2=10 x^6+71 x^5+88 x^4+13 x^3+78 x^2+47 x+24$
- $y^2=72 x^6+36 x^5+64 x^4+14 x^3+63 x^2+67 x+50$
- $y^2=45 x^6+27 x^5+14 x^4+66 x^3+63 x^2+78 x+86$
- $y^2=7 x^6+73 x^5+64 x^4+3 x^3+24 x+85$
- $y^2=72 x^6+61 x^5+2 x^4+81 x^3+62 x^2+66 x+48$
- $y^2=10 x^6+71 x^5+30 x^4+5 x^3+59 x^2+15 x+32$
- $y^2=47 x^6+61 x^5+9 x^4+9 x^3+23 x^2+73 x+26$
- $y^2=44 x^6+8 x^5+59 x^4+8 x^3+20 x^2+38 x+2$
- $y^2=31 x^5+73 x^4+39 x^3+18 x^2+63 x+65$
- $y^2=12 x^6+70 x^5+76 x^4+45 x^3+63 x^2+3 x+88$
- $y^2=8 x^6+82 x^5+24 x^4+79 x^3+88 x^2+29 x+56$
- $y^2=22 x^6+88 x^5+7 x^4+59 x^3+67 x^2+14 x+65$
- $y^2=42 x^6+11 x^5+3 x^4+71 x^3+64 x^2+60 x+84$
- $y^2=80 x^6+16 x^5+37 x^4+87 x^3+64 x^2+4 x+15$
- $y^2=77 x^6+21 x^5+57 x^4+21 x^3+18 x^2+11 x+26$
- $y^2=70 x^6+57 x^5+23 x^4+74 x^3+12 x^2+53 x+73$
- and 330 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{89}$.
Endomorphism algebra over $\F_{89}$| The endomorphism algebra of this simple isogeny class is 4.0.1122476.1. |
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.ab_cu | $2$ | (not in LMFDB) |