Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 8 x + 118 x^{2} + 536 x^{3} + 4489 x^{4}$ |
| Frobenius angles: | $\pm0.467729086357$, $\pm0.700827428926$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-55 +8 \sqrt{2}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $360$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5152$ | $20937728$ | $90244497952$ | $406048876642304$ | $1822788349503130912$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $76$ | $4662$ | $300052$ | $20150190$ | $1350088476$ | $90458394726$ | $6060719523172$ | $406067636550750$ | $27206533947747052$ | $1822837808678509462$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 360 curves (of which all are hyperelliptic):
- $y^2=52 x^6+51 x^5+37 x^4+2 x^3+57 x^2+63 x+63$
- $y^2=22 x^6+14 x^5+55 x^4+62 x^3+66 x^2+47 x+35$
- $y^2=65 x^6+65 x^5+11 x^4+35 x^3+41 x^2+21 x+28$
- $y^2=23 x^6+52 x^5+8 x^4+37 x^3+41 x^2+x+17$
- $y^2=19 x^6+34 x^5+6 x^4+43 x^3+11 x^2+37 x+51$
- $y^2=55 x^6+62 x^5+38 x^4+4 x^3+3 x^2+15 x+53$
- $y^2=33 x^6+16 x^5+55 x^4+13 x^3+48 x^2+6 x+36$
- $y^2=15 x^6+27 x^5+49 x^4+18 x^3+21 x^2+29 x+44$
- $y^2=50 x^6+43 x^5+18 x^4+2 x^3+15 x^2+20 x+64$
- $y^2=60 x^6+38 x^5+21 x^4+47 x^3+10 x^2+64 x+59$
- $y^2=17 x^6+31 x^5+48 x^4+65 x^3+56 x^2+19 x+3$
- $y^2=54 x^6+38 x^5+13 x^4+6 x^3+11 x^2+37 x+30$
- $y^2=21 x^6+49 x^4+5 x^2+12 x+66$
- $y^2=26 x^6+14 x^5+21 x^4+4 x^3+16 x^2+38 x+47$
- $y^2=42 x^6+x^5+23 x^4+43 x^3+38 x^2+63 x+60$
- $y^2=60 x^6+16 x^5+56 x^4+25 x^3+21 x^2+28 x+5$
- $y^2=32 x^6+65 x^5+10 x^4+48 x^3+43 x^2+2 x+35$
- $y^2=15 x^6+48 x^5+26 x^4+21 x^3+65 x^2+44 x+7$
- $y^2=19 x^6+53 x^5+24 x^4+35 x^3+18 x+34$
- $y^2=15 x^6+57 x^5+54 x^4+42 x^3+42 x^2+38 x+34$
- and 340 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 \(\Q(\sqrt{-55 +8 \sqrt{2}})\). |
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.ai_eo | $2$ | (not in LMFDB) |