Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 + 2 x + 89 x^{2} )( 1 + 10 x + 89 x^{2} )$ |
| $1 + 12 x + 198 x^{2} + 1068 x^{3} + 7921 x^{4}$ | |
| Frobenius angles: | $\pm0.533804287064$, $\pm0.677807684489$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $202$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $9200$ | $64768000$ | $495435465200$ | $3936295407616000$ | $31182427624020086000$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $102$ | $8174$ | $702774$ | $62737566$ | $5584186182$ | $496981045262$ | $44231335139478$ | $3936588753112126$ | $350356403548826406$ | $31181719943968553774$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 202 curves (of which all are hyperelliptic):
- $y^2=85 x^6+17 x^5+56 x^4+14 x^3+14 x^2+52 x+7$
- $y^2=74 x^6+53 x^5+10 x^4+19 x^2+71 x$
- $y^2=78 x^6+42 x^5+34 x^4+58 x^3+52 x^2+5 x+67$
- $y^2=11 x^6+2 x^5+49 x^4+80 x^3+7 x^2+67 x+11$
- $y^2=50 x^6+75 x^5+64 x^4+52 x^3+73 x^2+75 x+81$
- $y^2=4 x^6+82 x^5+35 x^4+10 x^3+6 x^2+12 x+5$
- $y^2=8 x^6+69 x^5+46 x^4+69 x^3+18 x^2+27 x+50$
- $y^2=58 x^6+50 x^5+7 x^4+78 x^3+76 x^2+58 x+53$
- $y^2=81 x^6+30 x^5+23 x^4+51 x^3+23 x^2+30 x+81$
- $y^2=25 x^6+70 x^5+17 x^4+73 x^3+17 x^2+70 x+25$
- $y^2=4 x^6+43 x^5+88 x^4+24 x^3+56 x^2+75 x+24$
- $y^2=21 x^6+70 x^5+53 x^4+41 x^3+46 x^2+2 x$
- $y^2=43 x^6+10 x^5+43 x^4+86 x^3+82 x^2+20 x+75$
- $y^2=62 x^6+85 x^5+15 x^4+76 x^3+15 x^2+85 x+62$
- $y^2=8 x^6+3 x^5+32 x^4+59 x^3+20 x^2+84 x+35$
- $y^2=85 x^6+69 x^5+81 x^4+83 x^3+26 x^2+25 x+53$
- $y^2=16 x^6+14 x^5+67 x^4+35 x^3+44 x^2+65 x+69$
- $y^2=47 x^6+28 x^5+33 x^4+59 x^3+5 x^2+54 x+49$
- $y^2=47 x^6+75 x^5+71 x^4+11 x^3+38 x^2+46 x+41$
- $y^2=21 x^6+67 x^5+4 x^4+66 x^3+77 x^2+87 x+9$
- and 182 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.c $\times$ 1.89.k and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
Base change
This is a primitive isogeny class.