Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 13 x + 67 x^{2} )( 1 + 4 x + 67 x^{2} )$ |
| $1 - 9 x + 82 x^{2} - 603 x^{3} + 4489 x^{4}$ | |
| Frobenius angles: | $\pm0.207941879321$, $\pm0.578570930462$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $270$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
This isogeny class is not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $3960$ | $20528640$ | $90361228320$ | $406124243712000$ | $1823029909460317800$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $59$ | $4573$ | $300440$ | $20153929$ | $1350267389$ | $90458864566$ | $6060707426903$ | $406067673589201$ | $27206534355403880$ | $1822837799824008493$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 270 curves (of which all are hyperelliptic):
- $y^2=54 x^6+20 x^5+33 x^4+6 x^3+65 x^2+33 x+37$
- $y^2=21 x^6+x^5+31 x^4+x^3+59 x^2+39 x+25$
- $y^2=3 x^6+46 x^5+57 x^4+58 x^3+59 x^2+13 x+23$
- $y^2=21 x^6+34 x^5+55 x^4+34 x^3+38 x^2+4 x+34$
- $y^2=64 x^6+34 x^5+16 x^4+53 x^3+14 x^2+19 x+62$
- $y^2=60 x^6+29 x^5+34 x^4+50 x^3+54 x^2+9 x+60$
- $y^2=23 x^6+53 x^5+26 x^4+33 x^3+4 x^2+7 x+47$
- $y^2=53 x^6+28 x^5+41 x^4+57 x^3+22 x^2+39 x+8$
- $y^2=51 x^6+23 x^5+22 x^4+6 x^3+39 x^2+3 x+12$
- $y^2=13 x^6+49 x^5+19 x^4+27 x^3+39 x^2+22 x+29$
- $y^2=19 x^6+65 x^5+21 x^4+64 x^3+56 x^2+27 x+12$
- $y^2=30 x^6+52 x^5+12 x^4+22 x^3+10 x^2+53 x+30$
- $y^2=34 x^6+37 x^5+29 x^4+3 x^3+53 x^2+9 x+33$
- $y^2=19 x^5+14 x^4+5 x^3+38 x^2+20 x+13$
- $y^2=34 x^6+45 x^5+64 x^4+51 x^3+7 x^2+12 x+63$
- $y^2=39 x^6+42 x^5+40 x^4+41 x^3+23 x^2+48 x+47$
- $y^2=2 x^6+45 x^5+26 x^4+61 x^3+x^2+51 x+56$
- $y^2=54 x^6+53 x^5+38 x^4+19 x^3+4 x^2+19 x+41$
- $y^2=50 x^6+26 x^5+55 x^4+66 x^2+37 x+46$
- $y^2=26 x^6+39 x^5+47 x^4+19 x^3+29 x^2+66 x+43$
- and 250 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{67}$.
Endomorphism algebra over $\F_{67}$| The isogeny class factors as 1.67.an $\times$ 1.67.e and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
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.ar_he | $2$ | (not in LMFDB) |
| 2.67.j_de | $2$ | (not in LMFDB) |
| 2.67.r_he | $2$ | (not in LMFDB) |