Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 8 x + 42 x^{2} - 536 x^{3} + 4489 x^{4}$ |
| Frobenius angles: | $\pm0.158111161304$, $\pm0.627688233937$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.13824.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $390$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $3988$ | $20243088$ | $90124624564$ | $406146953170944$ | $1823006295939683668$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $60$ | $4510$ | $299652$ | $20155054$ | $1350249900$ | $90458529550$ | $6060714642420$ | $406067744901214$ | $27206534326297884$ | $1822837802129607550$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 390 curves (of which all are hyperelliptic):
- $y^2=29 x^6+43 x^5+28 x^4+59 x^3+5 x^2+30 x+13$
- $y^2=46 x^6+30 x^5+22 x^4+36 x^3+23 x^2+54 x+34$
- $y^2=26 x^6+32 x^5+36 x^4+63 x^3+35 x^2+15 x+38$
- $y^2=4 x^6+49 x^5+8 x^4+56 x^3+51 x^2+10 x+12$
- $y^2=7 x^6+2 x^5+19 x^4+51 x^3+50 x^2+41 x+27$
- $y^2=19 x^6+63 x^5+31 x^4+9 x^3+42 x^2+43 x+40$
- $y^2=28 x^6+60 x^5+33 x^4+66 x^3+50 x^2+66 x+53$
- $y^2=60 x^6+63 x^5+10 x^4+5 x^3+34 x^2+32 x+23$
- $y^2=32 x^6+37 x^5+18 x^4+4 x^3+57 x^2+9 x+43$
- $y^2=50 x^6+25 x^5+57 x^4+37 x^3+59 x^2+6 x+37$
- $y^2=17 x^6+11 x^5+63 x^4+x^3+51 x^2+32 x+7$
- $y^2=3 x^6+27 x^5+60 x^4+19 x^3+4 x^2+54 x+17$
- $y^2=3 x^6+2 x^4+32 x^3+36 x^2+6 x+17$
- $y^2=52 x^6+11 x^5+32 x^4+43 x^3+49 x^2+13 x+7$
- $y^2=47 x^6+22 x^5+38 x^4+36 x^3+51 x^2+19 x+5$
- $y^2=56 x^6+58 x^5+37 x^4+42 x^3+40 x^2+61 x+53$
- $y^2=2 x^6+63 x^5+30 x^4+44 x^3+43 x^2+43 x+56$
- $y^2=45 x^6+9 x^5+8 x^4+33 x^3+39 x^2+25 x+30$
- $y^2=3 x^6+29 x^5+54 x^4+41 x^3+12 x^2+37 x+58$
- $y^2=47 x^6+15 x^5+38 x^4+10 x^3+43 x^2+62 x+54$
- 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 4.0.13824.1. |
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.i_bq | $2$ | (not in LMFDB) |