Invariants
| Base field: | $\F_{73}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 18 x + 195 x^{2} - 1314 x^{3} + 5329 x^{4}$ |
| Frobenius angles: | $\pm0.171875676227$, $\pm0.437320683201$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-179 +72 \sqrt{2}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $175$ |
| Cyclic group of points: | yes |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $4193$ | $28751401$ | $151629144464$ | $806414723775241$ | $4297639223793793073$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $56$ | $5396$ | $389774$ | $28396644$ | $2073078056$ | $151335295886$ | $11047410383240$ | $806460113884228$ | $58871586161595998$ | $4297625825464990196$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 175 curves (of which all are hyperelliptic):
- $y^2=58 x^6+28 x^5+22 x^4+68 x^3+53 x^2+35 x+15$
- $y^2=9 x^6+14 x^5+61 x^4+33 x^3+55 x^2+47 x+57$
- $y^2=34 x^6+31 x^5+66 x^4+56 x^3+14 x^2+33 x+11$
- $y^2=25 x^6+19 x^5+28 x^4+52 x^3+25 x^2+59 x+29$
- $y^2=61 x^6+44 x^5+9 x^4+63 x^3+66 x^2+50 x+67$
- $y^2=28 x^6+72 x^5+28 x^4+8 x^3+15 x^2+25 x+30$
- $y^2=21 x^6+64 x^5+34 x^4+43 x^3+61 x^2+9 x+44$
- $y^2=10 x^6+45 x^5+68 x^4+23 x^3+23 x^2+43 x+25$
- $y^2=34 x^6+48 x^5+27 x^4+71 x^3+5 x^2+7 x+21$
- $y^2=36 x^6+43 x^5+26 x^4+66 x^3+55 x^2+37 x+31$
- $y^2=68 x^6+49 x^5+51 x^4+x^3+61 x^2+65 x+53$
- $y^2=20 x^6+31 x^5+63 x^4+20 x^3+4 x^2+46 x+45$
- $y^2=21 x^6+25 x^5+8 x^4+39 x^3+49 x^2+4 x+49$
- $y^2=47 x^6+6 x^5+47 x^4+57 x^3+30 x^2+46 x+15$
- $y^2=30 x^6+47 x^5+69 x^4+59 x^3+66 x^2+68 x+43$
- $y^2=47 x^6+54 x^5+6 x^4+55 x^3+32 x^2+9 x+64$
- $y^2=65 x^6+65 x^5+4 x^4+29 x^3+17 x^2+20 x+30$
- $y^2=22 x^6+3 x^5+3 x^4+45 x^3+68 x+19$
- $y^2=x^6+37 x^5+2 x^4+13 x^3+16 x^2+33 x+58$
- $y^2=56 x^6+56 x^4+72 x^3+69 x^2+43 x+23$
- and 155 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{73}$.
Endomorphism algebra over $\F_{73}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-179 +72 \sqrt{2}})\). |
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 |
|---|---|---|
| 2.73.s_hn | $2$ | (not in LMFDB) |