Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 18 x + 174 x^{2} + 1206 x^{3} + 4489 x^{4}$ |
| Frobenius angles: | $\pm0.550707514736$, $\pm0.890013904330$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-146 +18 \sqrt{41}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $144$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5888$ | $20254720$ | $90474943232$ | $405888385024000$ | $1822893240085545728$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $86$ | $4514$ | $300818$ | $20142222$ | $1350166166$ | $90459018866$ | $6060703491698$ | $406067703252958$ | $27206534393367446$ | $1822837807060202114$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 144 curves (of which all are hyperelliptic):
- $y^2=17 x^6+36 x^5+12 x^4+9 x^3+49 x^2+21 x+26$
- $y^2=47 x^6+60 x^5+47 x^4+24 x^3+66 x^2+27 x+19$
- $y^2=38 x^6+33 x^5+61 x^4+61 x^3+33 x^2+4 x+4$
- $y^2=24 x^6+63 x^5+22 x^4+23 x^3+13 x^2+18 x+16$
- $y^2=23 x^6+7 x^5+16 x^4+45 x^3+33 x^2+8 x+4$
- $y^2=56 x^6+9 x^5+27 x^4+58 x^3+64 x^2+7 x+18$
- $y^2=60 x^6+6 x^5+42 x^3+18 x^2+53 x+64$
- $y^2=61 x^6+8 x^5+25 x^4+65 x^3+7 x^2+29 x+60$
- $y^2=53 x^6+x^5+11 x^4+40 x^3+31 x^2+20 x+9$
- $y^2=47 x^6+47 x^5+44 x^4+35 x^3+15 x^2+54 x+65$
- $y^2=65 x^6+43 x^5+27 x^4+21 x^3+57 x^2+39 x$
- $y^2=49 x^6+13 x^5+27 x^4+64 x^3+60 x^2+47 x+14$
- $y^2=46 x^6+30 x^5+17 x^4+18 x^3+47 x^2+7 x+4$
- $y^2=42 x^6+23 x^5+64 x^4+55 x^3+33 x^2+46 x+35$
- $y^2=48 x^6+42 x^5+13 x^4+x^3+35 x^2+51 x+26$
- $y^2=41 x^6+34 x^5+32 x^4+40 x^3+20 x^2+15 x+31$
- $y^2=6 x^6+6 x^5+13 x^4+2 x^3+15 x^2+51 x+40$
- $y^2=36 x^6+43 x^5+25 x^4+42 x^3+48 x^2+16 x+6$
- $y^2=14 x^6+27 x^5+6 x^4+56 x^3+57 x^2+52 x+11$
- $y^2=65 x^6+36 x^5+36 x^4+47 x^3+42 x^2+20 x+24$
- and 124 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 \(\Q(\sqrt{-146 +18 \sqrt{41}})\). |
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.as_gs | $2$ | (not in LMFDB) |