Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 10 x + 67 x^{2} )( 1 + 14 x + 67 x^{2} )$ |
| $1 + 4 x - 6 x^{2} + 268 x^{3} + 4489 x^{4}$ | |
| Frobenius angles: | $\pm0.290828956352$, $\pm0.826557230848$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $276$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $4756$ | $20032272$ | $90741631156$ | $406328835953664$ | $1822761340857582676$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $72$ | $4462$ | $301704$ | $20164078$ | $1350068472$ | $90458560222$ | $6060702861432$ | $406067670619486$ | $27206534578101288$ | $1822837805327000782$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 276 curves (of which all are hyperelliptic):
- $y^2=65 x^6+43 x^5+22 x^4+43 x^3+31 x^2+45 x+43$
- $y^2=33 x^6+22 x^5+24 x^4+44 x^3+57 x^2+20 x+64$
- $y^2=39 x^6+60 x^5+2 x^4+56 x^3+27 x^2+55 x+60$
- $y^2=19 x^6+32 x^5+50 x^4+24 x^3+19 x^2+26 x+45$
- $y^2=59 x^6+24 x^5+56 x^4+23 x^3+3 x^2+65 x+66$
- $y^2=48 x^6+30 x^5+34 x^4+2 x^3+37 x^2+43 x+24$
- $y^2=25 x^6+56 x^5+49 x^4+9 x^3+49 x^2+56 x+25$
- $y^2=11 x^6+6 x^5+61 x^4+16 x^3+36 x^2+18 x+35$
- $y^2=3 x^6+49 x^5+2 x^4+4 x^3+28 x^2+42 x+42$
- $y^2=58 x^6+38 x^5+16 x^4+47 x^3+65 x^2+36 x+65$
- $y^2=26 x^6+43 x^5+19 x^4+44 x^3+60 x^2+18 x+64$
- $y^2=60 x^6+7 x^5+57 x^4+48 x^3+23 x^2+26 x+32$
- $y^2=52 x^6+29 x^5+63 x^4+8 x^3+47 x^2+44 x+16$
- $y^2=5 x^6+26 x^5+28 x^4+63 x^3+28 x^2+26 x+5$
- $y^2=29 x^6+43 x^5+47 x^4+42 x^3+57 x^2+8 x+13$
- $y^2=20 x^6+54 x^5+17 x^4+9 x^3+11 x^2+50 x+25$
- $y^2=63 x^6+14 x^5+11 x^4+55 x^3+19 x^2+66 x+14$
- $y^2=44 x^6+27 x^5+64 x^4+62 x^3+25 x^2+29 x+11$
- $y^2=48 x^6+50 x^5+58 x^4+26 x^3+52 x^2+27 x+62$
- $y^2=54 x^6+63 x^5+30 x^4+36 x^3+61 x^2+46 x+61$
- and 256 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.ak $\times$ 1.67.o 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.ay_ko | $2$ | (not in LMFDB) |
| 2.67.ae_ag | $2$ | (not in LMFDB) |
| 2.67.y_ko | $2$ | (not in LMFDB) |