Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 15 x + 160 x^{2} - 1335 x^{3} + 7921 x^{4}$ |
| Frobenius angles: | $\pm0.174052905698$, $\pm0.518852613731$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.9295704.2 |
| Galois group: | $D_{4}$ |
| Jacobians: | $384$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $6732$ | $63496224$ | $496855771632$ | $3936197215817856$ | $31182729684668708652$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $75$ | $8017$ | $704790$ | $62736001$ | $5584240275$ | $496984009102$ | $44231339829675$ | $3936588735648193$ | $350356404063615750$ | $31181719931573460577$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 384 curves (of which all are hyperelliptic):
- $y^2=43 x^6+9 x^5+27 x^4+21 x^3+60 x^2+71 x+7$
- $y^2=82 x^6+58 x^5+83 x^4+16 x^3+66 x^2+22 x+48$
- $y^2=83 x^6+19 x^5+59 x^4+30 x^3+34 x^2+49 x+53$
- $y^2=87 x^6+47 x^5+39 x^4+33 x^3+86 x^2+5 x+10$
- $y^2=x^6+x^5+84 x^4+6 x^3+43 x^2+37 x+36$
- $y^2=55 x^6+59 x^5+38 x^4+29 x^3+48 x^2+81 x+80$
- $y^2=7 x^6+81 x^5+49 x^4+39 x^3+31 x^2+25 x+58$
- $y^2=79 x^6+18 x^5+68 x^4+28 x^3+8 x^2+36 x+15$
- $y^2=23 x^6+35 x^5+x^4+52 x^3+19 x^2+7 x+4$
- $y^2=57 x^6+38 x^5+17 x^4+37 x^3+25 x^2+41 x+23$
- $y^2=51 x^6+86 x^5+21 x^4+30 x^3+72 x^2+63 x+55$
- $y^2=9 x^6+31 x^5+88 x^4+58 x^3+54 x^2+85 x+61$
- $y^2=76 x^6+48 x^5+23 x^4+31 x^3+48 x^2+35 x+37$
- $y^2=38 x^6+23 x^5+63 x^4+31 x^3+84 x^2+40 x+46$
- $y^2=75 x^6+54 x^5+68 x^4+16 x^3+19 x^2+25 x+64$
- $y^2=5 x^6+20 x^5+43 x^4+36 x^3+61 x^2+32 x+63$
- $y^2=24 x^6+79 x^5+5 x^4+13 x^3+20 x^2+30 x+3$
- $y^2=33 x^6+37 x^5+58 x^4+16 x^3+39 x^2+10 x+41$
- $y^2=74 x^6+66 x^5+22 x^4+36 x^3+87 x^2+16 x+47$
- $y^2=16 x^6+60 x^5+59 x^4+32 x^3+50 x^2+18 x+6$
- and 364 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 4.0.9295704.2. |
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.p_ge | $2$ | (not in LMFDB) |