Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 12 x + 162 x^{2} + 804 x^{3} + 4489 x^{4}$ |
| Frobenius angles: | $\pm0.562060081807$, $\pm0.681304311551$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-28 +3 \sqrt{2}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $112$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5468$ | $20975248$ | $89950748924$ | $406056637794304$ | $1822948643016159068$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $80$ | $4670$ | $299072$ | $20150574$ | $1350207200$ | $90458038190$ | $6060710470160$ | $406067683361374$ | $27206534418583664$ | $1822837805800728350$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 112 curves (of which all are hyperelliptic):
- $y^2=59 x^6+29 x^5+7 x^4+31 x^3+46 x^2+7 x+36$
- $y^2=2 x^6+14 x^5+7 x^4+25 x^3+66 x^2+39 x+22$
- $y^2=45 x^6+29 x^5+31 x^4+30 x^3+23 x^2+8 x+36$
- $y^2=23 x^6+39 x^5+48 x^4+19 x^3+38 x^2+53 x+24$
- $y^2=17 x^6+56 x^5+42 x^4+60 x^3+22 x^2+29 x+52$
- $y^2=8 x^6+12 x^5+63 x^4+47 x^3+44 x^2+56 x+39$
- $y^2=41 x^6+57 x^5+44 x^4+58 x^3+41 x^2+48 x+26$
- $y^2=48 x^5+40 x^4+64 x^3+55 x^2+59 x+62$
- $y^2=12 x^6+46 x^5+15 x^4+50 x^3+11 x^2+34 x+41$
- $y^2=32 x^6+16 x^5+6 x^4+57 x^3+53 x^2+33 x+15$
- $y^2=11 x^6+48 x^5+x^4+24 x^3+51 x^2+47 x+5$
- $y^2=47 x^6+19 x^5+61 x^4+37 x^3+38 x^2+41 x+29$
- $y^2=38 x^6+30 x^5+61 x^4+7 x^3+41 x^2+42 x+36$
- $y^2=59 x^6+52 x^5+57 x^4+33 x^3+56 x^2+66 x+17$
- $y^2=51 x^6+15 x^5+50 x^4+6 x^3+37 x^2+11 x+49$
- $y^2=65 x^6+54 x^5+14 x^4+59 x^3+48 x^2+26 x+27$
- $y^2=46 x^6+8 x^5+32 x^4+52 x^3+54 x^2+12 x+17$
- $y^2=61 x^6+50 x^5+35 x^4+3 x^3+43 x^2+52 x+38$
- $y^2=36 x^6+44 x^5+4 x^4+20 x^3+53 x^2+62 x+20$
- $y^2=30 x^6+50 x^5+44 x^4+3 x^3+24 x^2+60 x+66$
- and 92 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 \(\Q(\sqrt{-28 +3 \sqrt{2}})\). |
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_gg | $2$ | (not in LMFDB) |