Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 8 x + 42 x^{2} + 536 x^{3} + 4489 x^{4}$ |
| Frobenius angles: | $\pm0.372311766063$, $\pm0.841888838696$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-3 + \sqrt{3}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $390$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5076$ | $20243088$ | $90793523700$ | $406146953170944$ | $1822669326314728596$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $76$ | $4510$ | $301876$ | $20155054$ | $1350000316$ | $90458529550$ | $6060708568228$ | $406067744901214$ | $27206534466292012$ | $1822837802129607550$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 390 curves (of which all are hyperelliptic):
- $y^2=48 x^6+55 x^5+14 x^4+63 x^3+36 x^2+15 x+40$
- $y^2=25 x^6+60 x^5+44 x^4+5 x^3+46 x^2+41 x+1$
- $y^2=52 x^6+64 x^5+5 x^4+59 x^3+3 x^2+30 x+9$
- $y^2=8 x^6+31 x^5+16 x^4+45 x^3+35 x^2+20 x+24$
- $y^2=14 x^6+4 x^5+38 x^4+35 x^3+33 x^2+15 x+54$
- $y^2=43 x^6+65 x^5+49 x^4+38 x^3+21 x^2+55 x+20$
- $y^2=14 x^6+30 x^5+50 x^4+33 x^3+25 x^2+33 x+60$
- $y^2=30 x^6+65 x^5+5 x^4+36 x^3+17 x^2+16 x+45$
- $y^2=16 x^6+52 x^5+9 x^4+2 x^3+62 x^2+38 x+55$
- $y^2=33 x^6+50 x^5+47 x^4+7 x^3+51 x^2+12 x+7$
- $y^2=34 x^6+22 x^5+59 x^4+2 x^3+35 x^2+64 x+14$
- $y^2=6 x^6+54 x^5+53 x^4+38 x^3+8 x^2+41 x+34$
- $y^2=35 x^6+x^4+16 x^3+18 x^2+3 x+42$
- $y^2=37 x^6+22 x^5+64 x^4+19 x^3+31 x^2+26 x+14$
- $y^2=27 x^6+44 x^5+9 x^4+5 x^3+35 x^2+38 x+10$
- $y^2=45 x^6+49 x^5+7 x^4+17 x^3+13 x^2+55 x+39$
- $y^2=4 x^6+59 x^5+60 x^4+21 x^3+19 x^2+19 x+45$
- $y^2=23 x^6+18 x^5+16 x^4+66 x^3+11 x^2+50 x+60$
- $y^2=6 x^6+58 x^5+41 x^4+15 x^3+24 x^2+7 x+49$
- $y^2=57 x^6+41 x^5+19 x^4+5 x^3+55 x^2+31 x+27$
- and 370 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 \(\Q(\sqrt{-3 + \sqrt{3}})\). |
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.ai_bq | $2$ | (not in LMFDB) |