Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 4489 x^{4}$ |
| Frobenius angles: | $\pm0.250000000000$, $\pm0.750000000000$ |
| Angle rank: | $0$ (numerical) |
| Number field: | \(\Q(i, \sqrt{134})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $244$ |
| Cyclic group of points: | yes |
This isogeny class is simple but not geometrically simple, primitive, not ordinary, and supersingular. It is principally polarizable and contains a Jacobian.
Newton polygon
This isogeny class is supersingular.
| $p$-rank: | $0$ |
| Slopes: | $[1/2, 1/2, 1/2, 1/2]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $4490$ | $20160100$ | $90458382170$ | $406429632010000$ | $1822837804551761450$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $68$ | $4490$ | $300764$ | $20169078$ | $1350125108$ | $90458382170$ | $6060711605324$ | $406067596952158$ | $27206534396294948$ | $1822837804551761450$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 244 curves (of which all are hyperelliptic):
- $y^2=x^5+66$
- $y^2=2 x^5+65$
- $y^2=34 x^6+48 x^5+5 x^4+30 x^3+38 x^2+11 x+17$
- $y^2=x^6+29 x^5+10 x^4+60 x^3+9 x^2+22 x+34$
- $y^2=33 x^6+7 x^5+x^4+60 x^3+61 x^2+31 x+29$
- $y^2=66 x^6+14 x^5+2 x^4+53 x^3+55 x^2+62 x+58$
- $y^2=39 x^6+50 x^5+39 x^4+28 x^3+64 x^2+50 x+44$
- $y^2=11 x^6+33 x^5+11 x^4+56 x^3+61 x^2+33 x+21$
- $y^2=35 x^6+28 x^5+12 x^4+36 x^3+8 x^2+31 x+13$
- $y^2=3 x^6+56 x^5+24 x^4+5 x^3+16 x^2+62 x+26$
- $y^2=33 x^6+7 x^5+44 x^4+44 x^2+60 x+33$
- $y^2=66 x^6+14 x^5+21 x^4+21 x^2+53 x+66$
- $y^2=52 x^6+51 x^5+46 x^4+20 x^3+5 x^2+2 x+59$
- $y^2=37 x^6+35 x^5+25 x^4+40 x^3+10 x^2+4 x+51$
- $y^2=10 x^6+15 x^5+46 x^4+17 x^3+57 x^2+66 x+25$
- $y^2=20 x^6+30 x^5+25 x^4+34 x^3+47 x^2+65 x+50$
- $y^2=39 x^6+60 x^5+61 x^4+46 x^3+34 x^2+2 x+48$
- $y^2=11 x^6+53 x^5+55 x^4+25 x^3+x^2+4 x+29$
- $y^2=32 x^6+22 x^5+53 x^4+66 x^3+35 x^2+63 x+7$
- $y^2=64 x^6+44 x^5+39 x^4+65 x^3+3 x^2+59 x+14$
- and 224 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{67^{4}}$.
Endomorphism algebra over $\F_{67}$| The endomorphism algebra of this simple isogeny class is \(\Q(i, \sqrt{134})\). |
| The base change of $A$ to $\F_{67^{4}}$ is 1.20151121.nhi 2 and its endomorphism algebra is $\mathrm{M}_{2}(B)$, where $B$ is the quaternion algebra over \(\Q\) ramified at $67$ and $\infty$. |
- Endomorphism algebra over $\F_{67^{2}}$
The base change of $A$ to $\F_{67^{2}}$ is 1.4489.a 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-1}) \)$)$
Base change
This is a primitive isogeny class.