Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 12 x + 190 x^{2} - 1068 x^{3} + 7921 x^{4}$ |
| Frobenius angles: | $\pm0.303971903563$, $\pm0.481414796400$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-74 +6 \sqrt{6}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $252$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7032$ | $64638144$ | $498328256376$ | $3936395745930240$ | $31181427716535983352$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $78$ | $8158$ | $706878$ | $62739166$ | $5584007118$ | $496981415806$ | $44231327938302$ | $3936588666969406$ | $350356403912421582$ | $31181719950365419678$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 252 curves (of which all are hyperelliptic):
- $y^2=33 x^6+41 x^5+74 x^4+66 x^3+63 x^2+72 x+63$
- $y^2=45 x^6+87 x^5+58 x^4+9 x^3+19 x^2+29 x+41$
- $y^2=42 x^6+35 x^5+12 x^4+20 x^3+60 x^2+12 x+19$
- $y^2=63 x^6+46 x^5+77 x^4+13 x^3+17 x^2+69 x+54$
- $y^2=63 x^6+48 x^5+39 x^4+52 x^3+36 x^2+58 x+3$
- $y^2=4 x^6+80 x^5+7 x^4+17 x^3+27 x^2+70 x+72$
- $y^2=26 x^6+4 x^5+16 x^4+30 x^3+50 x^2+52 x$
- $y^2=45 x^6+27 x^5+83 x^4+69 x^3+39 x+8$
- $y^2=72 x^6+87 x^5+20 x^4+55 x^3+45 x^2+28 x+19$
- $y^2=35 x^6+12 x^5+52 x^4+26 x^3+62 x^2+45 x+23$
- $y^2=66 x^6+53 x^5+45 x^4+86 x^3+40 x^2+4 x+54$
- $y^2=59 x^6+23 x^5+39 x^4+56 x^3+3 x^2+2 x+62$
- $y^2=76 x^6+10 x^5+11 x^4+15 x^3+54 x^2+57 x+46$
- $y^2=60 x^6+20 x^5+78 x^4+43 x^3+70 x^2+29 x+86$
- $y^2=71 x^6+14 x^4+7 x^3+21 x^2+51 x+60$
- $y^2=83 x^6+25 x^5+51 x^4+69 x^3+59 x^2+34 x+11$
- $y^2=23 x^6+30 x^5+83 x^4+3 x^3+19 x^2+5 x+18$
- $y^2=29 x^6+31 x^5+x^4+47 x^3+49 x^2+78 x+57$
- $y^2=x^6+67 x^5+75 x^4+10 x^3+60 x^2+46 x+63$
- $y^2=86 x^6+4 x^5+59 x^4+11 x^3+70 x^2+42 x+70$
- and 232 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 \(\Q(\sqrt{-74 +6 \sqrt{6}})\). |
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.m_hi | $2$ | (not in LMFDB) |