Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 12 x + 130 x^{2} + 804 x^{3} + 4489 x^{4}$ |
| Frobenius angles: | $\pm0.493688974765$, $\pm0.771317596464$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.153600.2 |
| Galois group: | $D_{4}$ |
| Jacobians: | $238$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5436$ | $20678544$ | $90296531676$ | $406061756246016$ | $1822738670746738236$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $80$ | $4606$ | $300224$ | $20150830$ | $1350051680$ | $90459214702$ | $6060713819408$ | $406067603105374$ | $27206534662141808$ | $1822837805522904286$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 238 curves (of which all are hyperelliptic):
- $y^2=32 x^6+29 x^5+26 x^4+34 x^3+65 x^2+25 x+14$
- $y^2=58 x^6+57 x^5+23 x^4+62 x^3+47 x^2+38 x+20$
- $y^2=15 x^6+61 x^5+31 x^4+31 x^3+43 x^2+62 x+59$
- $y^2=31 x^6+37 x^5+30 x^4+28 x^3+31 x^2+41$
- $y^2=16 x^6+17 x^5+13 x^4+44 x^3+41 x^2+33 x+40$
- $y^2=36 x^6+60 x^5+36 x^4+22 x^3+26 x^2+35 x+48$
- $y^2=14 x^6+63 x^5+18 x^4+33 x^3+35 x^2+20 x+47$
- $y^2=56 x^6+63 x^5+7 x^4+5 x^3+65 x^2+8 x+66$
- $y^2=20 x^6+62 x^5+53 x^4+x^3+29 x^2+44 x+1$
- $y^2=35 x^6+23 x^5+26 x^4+52 x^3+19 x+63$
- $y^2=10 x^6+18 x^5+23 x^4+13 x^3+10 x^2+2 x+3$
- $y^2=41 x^6+12 x^5+19 x^4+8 x^3+33 x^2+36 x+57$
- $y^2=24 x^5+42 x^4+63 x^3+45 x^2+22 x+44$
- $y^2=28 x^6+16 x^5+31 x^4+47 x^3+17 x^2+38 x+65$
- $y^2=40 x^6+34 x^5+39 x^4+3 x^3+16 x^2+40 x+19$
- $y^2=16 x^6+10 x^5+5 x^4+13 x^3+23 x^2+52 x+38$
- $y^2=21 x^6+42 x^5+57 x^4+37 x^3+36 x^2+x+13$
- $y^2=11 x^6+57 x^5+60 x^4+7 x^3+66 x^2+18 x+12$
- $y^2=31 x^6+24 x^5+56 x^4+24 x^3+3 x^2+39 x+16$
- $y^2=24 x^6+22 x^5+54 x^4+47 x^3+21 x^2+26 x+10$
- and 218 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{67}$.
Endomorphism algebra over $\F_{67}$| The endomorphism algebra of this simple isogeny class is 4.0.153600.2. |
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.am_fa | $2$ | (not in LMFDB) |