Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 + 6 x + 89 x^{2} )^{2}$ |
| $1 + 12 x + 214 x^{2} + 1068 x^{3} + 7921 x^{4}$ | |
| Frobenius angles: | $\pm0.603010988689$, $\pm0.603010988689$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $222$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $9216$ | $65028096$ | $495030445056$ | $3936046605926400$ | $31183387207218717696$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $102$ | $8206$ | $702198$ | $62733598$ | $5584358022$ | $496980268846$ | $44231314455318$ | $3936589019311678$ | $350356404245006502$ | $31181719907729801806$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 222 curves (of which all are hyperelliptic):
- $y^2=72 x^6+82 x^5+26 x^4+65 x^3+26 x^2+82 x+72$
- $y^2=73 x^5+34 x^4+23 x^3+22 x^2+x$
- $y^2=71 x^6+42 x^5+64 x^4+16 x^3+64 x^2+42 x+71$
- $y^2=79 x^6+77 x^5+54 x^4+64 x^3+54 x^2+77 x+79$
- $y^2=66 x^6+45 x^5+18 x^4+70 x^3+18 x^2+45 x+66$
- $y^2=75 x^6+46 x^5+36 x^4+67 x^3+62 x^2+24 x+14$
- $y^2=16 x^6+53 x^5+70 x^4+7 x^3+70 x^2+53 x+16$
- $y^2=66 x^6+12 x^5+9 x^4+24 x^3+9 x^2+12 x+66$
- $y^2=33 x^6+29 x^5+3 x^4+81 x^3+48 x^2+52 x+58$
- $y^2=27 x^6+82 x^5+28 x^4+32 x^3+37 x^2+14 x+24$
- $y^2=71 x^6+64 x^5+x^4+55 x^3+x^2+64 x+71$
- $y^2=50 x^6+27 x^5+71 x^4+10 x^3+44 x^2+13 x+47$
- $y^2=50 x^6+48 x^5+83 x^4+56 x^3+84 x^2+36 x+35$
- $y^2=29 x^6+63 x^5+28 x^4+24 x^3+28 x^2+63 x+29$
- $y^2=36 x^6+58 x^5+78 x^4+51 x^3+78 x^2+58 x+36$
- $y^2=18 x^6+84 x^5+38 x^4+83 x^3+38 x^2+84 x+18$
- $y^2=31 x^6+77 x^5+59 x^4+70 x^3+59 x^2+77 x+31$
- $y^2=41 x^6+81 x^5+18 x^4+31 x^3+53 x^2+57 x+28$
- $y^2=46 x^6+25 x^5+76 x^4+9 x^3+76 x^2+25 x+46$
- $y^2=6 x^6+12 x^5+4 x^4+31 x^3+21 x^2+55 x+45$
- and 202 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.g 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-5}) \)$)$ |
Base change
This is a primitive isogeny class.