Invariants
| Base field: | $\F_{73}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 34 x^{2} + 5329 x^{4}$ |
| Frobenius angles: | $\pm0.212593068854$, $\pm0.787406931146$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{5}, \sqrt{-7})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $318$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
This isogeny class is simple but not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5296$ | $28047616$ | $151334730544$ | $806999919169536$ | $4297625825877676336$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $74$ | $5262$ | $389018$ | $28417246$ | $2073071594$ | $151335234798$ | $11047398519098$ | $806460024911038$ | $58871586708267914$ | $4297625822051795022$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 318 curves (of which all are hyperelliptic):
- $y^2=27 x^6+53 x^5+58 x^4+41 x^3+48 x^2+22 x+22$
- $y^2=55 x^6+55 x^5+30 x^4+17 x^3+25 x^2+x+14$
- $y^2=56 x^6+56 x^5+4 x^4+12 x^3+52 x^2+5 x+70$
- $y^2=63 x^6+12 x^5+65 x^4+7 x^3+52 x^2+69 x+27$
- $y^2=47 x^5+35 x^4+7 x^3+20 x^2+58 x+40$
- $y^2=16 x^5+29 x^4+35 x^3+27 x^2+71 x+54$
- $y^2=15 x^6+70 x^5+62 x^4+63 x^3+48 x^2+5 x+13$
- $y^2=2 x^6+58 x^5+18 x^4+23 x^3+21 x^2+25 x+65$
- $y^2=7 x^6+7 x^5+30 x^4+32 x^3+5 x^2+14 x$
- $y^2=35 x^6+35 x^5+4 x^4+14 x^3+25 x^2+70 x$
- $y^2=67 x^6+49 x^5+42 x^4+50 x^3+12 x^2+30 x+52$
- $y^2=57 x^6+71 x^5+14 x^4+47 x^3+62 x^2+67 x+69$
- $y^2=35 x^6+42 x^5+55 x^3+32 x^2+21 x+46$
- $y^2=29 x^6+64 x^5+56 x^3+14 x^2+32 x+11$
- $y^2=5 x^6+65 x^5+53 x^4+27 x^3+4 x^2+56 x+61$
- $y^2=25 x^6+33 x^5+46 x^4+62 x^3+20 x^2+61 x+13$
- $y^2=48 x^6+62 x^5+6 x^4+21 x^3+63 x^2+49 x+71$
- $y^2=25 x^6+54 x^5+4 x^4+7 x^3+51 x^2+64 x+29$
- $y^2=15 x^6+47 x^5+40 x^4+57 x^3+24 x^2+14 x+12$
- $y^2=19 x^6+64 x^5+67 x^4+47 x^3+34 x^2+57 x+57$
- and 298 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{73^{2}}$.
Endomorphism algebra over $\F_{73}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{5}, \sqrt{-7})\). |
| The base change of $A$ to $\F_{73^{2}}$ is 1.5329.abi 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-35}) \)$)$ |
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 |
|---|---|---|
| 2.73.a_bi | $4$ | (not in LMFDB) |