Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 2 x + 118 x^{2} + 134 x^{3} + 4489 x^{4}$ |
| Frobenius angles: | $\pm0.438900223916$, $\pm0.601315046347$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.4510712.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $160$ |
| Isomorphism classes: | 256 |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $4744$ | $21215168$ | $90368821288$ | $405884520863744$ | $1822855735191360424$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $70$ | $4722$ | $300466$ | $20142030$ | $1350138390$ | $90458426946$ | $6060712504546$ | $406067709508830$ | $27206534160659494$ | $1822837800931178962$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 160 curves (of which all are hyperelliptic):
- $y^2=44 x^6+32 x^5+8 x^4+51 x^3+49 x^2+34 x+39$
- $y^2=15 x^6+30 x^5+55 x^4+56 x^3+52 x^2+27 x+17$
- $y^2=43 x^6+10 x^5+27 x^4+53 x^3+14 x^2+33 x$
- $y^2=63 x^6+x^5+19 x^4+35 x^3+35 x^2+62 x+37$
- $y^2=36 x^6+26 x^5+27 x^4+38 x^3+2 x^2+50 x+17$
- $y^2=24 x^6+29 x^5+56 x^4+28 x^3+28 x^2+8 x+8$
- $y^2=58 x^6+55 x^5+8 x^4+29 x^3+44 x^2+61 x+32$
- $y^2=24 x^6+21 x^5+19 x^4+22 x^3+36 x^2+28 x+51$
- $y^2=35 x^6+48 x^5+47 x^4+14 x^3+13 x^2+45 x+49$
- $y^2=54 x^6+9 x^5+29 x^4+54 x^3+54 x^2+5 x+41$
- $y^2=4 x^6+50 x^5+26 x^4+64 x^3+10 x^2+23 x+50$
- $y^2=30 x^6+48 x^5+40 x^4+55 x^3+25 x^2+8 x+64$
- $y^2=54 x^6+49 x^5+42 x^4+30 x^3+5 x^2+63 x+39$
- $y^2=19 x^6+30 x^5+40 x^4+62 x^3+23 x^2+4 x+18$
- $y^2=53 x^6+64 x^5+x^4+23 x^3+60 x^2+63 x+43$
- $y^2=10 x^6+45 x^5+43 x^4+10 x^3+27 x+43$
- $y^2=44 x^6+14 x^5+44 x^4+41 x^3+15 x^2+11 x+1$
- $y^2=21 x^6+6 x^5+50 x^4+22 x^3+65 x^2+46 x+14$
- $y^2=13 x^6+7 x^5+18 x^4+9 x^3+30 x^2+3$
- $y^2=24 x^6+40 x^5+56 x^4+37 x^3+50 x^2+11 x+31$
- and 140 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 4.0.4510712.1. |
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_eo | $2$ | (not in LMFDB) |