Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 2 x + 2 x^{2} + 134 x^{3} + 4489 x^{4}$ |
| Frobenius angles: | $\pm0.277532102617$, $\pm0.777532102617$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(i, \sqrt{133})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $196$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
This isogeny class is simple but not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $4628$ | $20159568$ | $90578165444$ | $406408181946624$ | $1822778996750956868$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $70$ | $4490$ | $301162$ | $20168014$ | $1350081550$ | $90458382170$ | $6060707642290$ | $406067615491294$ | $27206534723883574$ | $1822837804551761450$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 196 curves (of which all are hyperelliptic):
- $y^2=13 x^6+x^5+32 x^4+49 x^3+53 x^2+50 x+35$
- $y^2=11 x^6+60 x^5+5 x^4+15 x^3+4 x^2+36 x+42$
- $y^2=41 x^6+54 x^5+30 x^4+55 x^3+62 x^2+15 x+35$
- $y^2=53 x^6+50 x^4+61 x^3+35 x^2+4 x+2$
- $y^2=35 x^6+17 x^5+33 x^4+38 x^3+11 x^2+62 x+35$
- $y^2=28 x^6+26 x^5+25 x^4+29 x^3+18 x^2+48 x+13$
- $y^2=16 x^6+28 x^5+19 x^4+12 x^3+18 x^2+8 x+10$
- $y^2=47 x^6+62 x^5+66 x^4+26 x^3+14 x^2+37 x+46$
- $y^2=23 x^6+9 x^5+53 x^4+31 x^3+64 x^2+27 x+34$
- $y^2=64 x^6+36 x^5+x^4+8 x^3+64 x^2+66 x+49$
- $y^2=40 x^6+29 x^5+65 x^4+3 x^3+x^2+60 x+52$
- $y^2=50 x^6+6 x^5+22 x^4+38 x^3+39 x^2+35 x$
- $y^2=49 x^6+11 x^5+44 x^4+46 x^3+24 x^2+13 x+22$
- $y^2=24 x^6+53 x^5+7 x^4+21 x^3+56 x^2+4 x+43$
- $y^2=58 x^6+6 x^5+22 x^4+3 x^3+38 x^2+9 x+62$
- $y^2=22 x^6+59 x^5+45 x^4+48 x^3+11 x^2+17 x+62$
- $y^2=12 x^6+64 x^5+31 x^4+10 x^3+3 x^2+47 x+46$
- $y^2=33 x^6+53 x^5+44 x^4+28 x^3+41 x^2+14 x+61$
- $y^2=15 x^6+53 x^5+64 x^4+53 x^3+49 x^2+64 x+54$
- $y^2=58 x^6+5 x^5+40 x^4+50 x^3+38 x^2+14 x+16$
- and 176 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 \(\Q(i, \sqrt{133})\). |
| The base change of $A$ to $\F_{67^{4}}$ is 1.20151121.mmw 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-133}) \)$)$ |
- Endomorphism algebra over $\F_{67^{2}}$
The base change of $A$ to $\F_{67^{2}}$ is the simple isogeny class 2.4489.a_mmw and its endomorphism algebra is \(\Q(i, \sqrt{133})\).
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 |
|---|---|---|
| 2.67.ac_c | $2$ | (not in LMFDB) |
| 2.67.a_afc | $8$ | (not in LMFDB) |
| 2.67.a_fc | $8$ | (not in LMFDB) |