Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 4 x + 98 x^{2} + 268 x^{3} + 4489 x^{4}$ |
| Frobenius angles: | $\pm0.414903894831$, $\pm0.669800981057$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-24 +7 \sqrt{10}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $378$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $4860$ | $20975760$ | $90365484060$ | $406077289113600$ | $1822786613508901500$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $72$ | $4670$ | $300456$ | $20151598$ | $1350087192$ | $90457761710$ | $6060719057976$ | $406067716575838$ | $27206533846346472$ | $1822837803715608350$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 378 curves (of which all are hyperelliptic):
- $y^2=64 x^6+29 x^5+43 x^4+56 x^3+65 x^2+29 x+57$
- $y^2=12 x^6+35 x^5+49 x^4+38 x^3+22 x^2+59 x+19$
- $y^2=2 x^6+64 x^5+8 x^4+18 x^3+59 x^2+14 x+44$
- $y^2=33 x^6+x^5+19 x^4+32 x^3+43 x^2+57 x+3$
- $y^2=19 x^6+21 x^5+49 x^4+19 x^3+13 x^2+34 x+8$
- $y^2=31 x^6+45 x^5+27 x^4+33 x^3+26 x^2+30 x+19$
- $y^2=50 x^6+12 x^5+2 x^4+16 x^3+48 x^2+20 x+41$
- $y^2=28 x^6+32 x^5+2 x^4+3 x^3+22 x^2+2 x+62$
- $y^2=51 x^6+14 x^5+56 x^4+24 x^3+8 x^2+13 x+59$
- $y^2=27 x^6+49 x^5+22 x^4+57 x^3+36 x^2+50 x+19$
- $y^2=60 x^6+51 x^5+47 x^4+2 x^3+29 x^2+16 x+3$
- $y^2=64 x^6+45 x^5+36 x^4+56 x^3+25 x^2+40 x+12$
- $y^2=49 x^6+22 x^5+42 x^4+35 x^3+57 x^2+57 x+32$
- $y^2=40 x^6+31 x^5+x^4+46 x^3+4 x^2+23 x+37$
- $y^2=51 x^6+26 x^5+22 x^4+16 x^3+34 x^2+21 x+53$
- $y^2=8 x^6+46 x^5+12 x^4+38 x^3+66 x^2+10 x+35$
- $y^2=21 x^6+19 x^5+6 x^4+8 x^3+29 x^2+36 x+13$
- $y^2=23 x^6+24 x^5+56 x^4+30 x^3+36 x^2+12 x+62$
- $y^2=34 x^6+45 x^5+20 x^4+37 x^3+52 x^2+48 x+59$
- $y^2=10 x^6+39 x^5+29 x^4+19 x^3+31 x^2+65 x+18$
- and 358 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 \(\Q(\sqrt{-24 +7 \sqrt{10}})\). |
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.ae_du | $2$ | (not in LMFDB) |