Invariants
| Base field: | $\F_{79}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 8 x + 111 x^{2} - 632 x^{3} + 6241 x^{4}$ |
| Frobenius angles: | $\pm0.265640446364$, $\pm0.571091310687$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.4541712.2 |
| Galois group: | $D_{4}$ |
| Jacobians: | $170$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5713$ | $39951009$ | $243213676036$ | $1517280873493833$ | $9468758306127644113$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $72$ | $6400$ | $493296$ | $38954500$ | $3077213112$ | $243087394534$ | $19203892297704$ | $1517108754637828$ | $119851596376303056$ | $9468276081744676480$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 170 curves (of which all are hyperelliptic):
- $y^2=45 x^6+66 x^5+30 x^4+15 x^3+4 x^2+24 x+35$
- $y^2=41 x^6+18 x^5+47 x^4+70 x^3+14 x^2+34 x+10$
- $y^2=43 x^6+59 x^5+72 x^4+68 x^3+24 x^2+10$
- $y^2=24 x^6+48 x^5+24 x^4+17 x^3+18 x^2+75 x+66$
- $y^2=7 x^6+13 x^5+34 x^4+40 x^3+29 x^2+18 x+39$
- $y^2=16 x^6+17 x^5+58 x^4+22 x^3+2 x^2+22 x+39$
- $y^2=40 x^6+30 x^5+70 x^4+49 x^3+59 x^2+59 x+72$
- $y^2=21 x^6+74 x^5+45 x^4+3 x^3+4 x^2+11 x+78$
- $y^2=33 x^6+57 x^5+71 x^4+30 x^3+39 x^2+65 x+7$
- $y^2=30 x^6+21 x^5+61 x^4+36 x^3+18 x^2+65 x+40$
- $y^2=43 x^6+10 x^5+5 x^4+64 x^3+59 x^2+68 x+24$
- $y^2=19 x^6+42 x^5+69 x^4+20 x^3+24 x^2+49 x+77$
- $y^2=62 x^6+56 x^5+45 x^4+16 x^3+48 x^2+56 x+21$
- $y^2=3 x^6+22 x^5+44 x^4+59 x^3+52 x^2+12 x+29$
- $y^2=x^6+34 x^5+24 x^4+73 x^3+42 x^2+53 x+41$
- $y^2=72 x^6+69 x^5+62 x^4+56 x^3+47 x^2+5 x+73$
- $y^2=72 x^6+5 x^5+78 x^4+30 x^3+41 x^2+40 x+23$
- $y^2=28 x^6+22 x^5+71 x^4+78 x^3+12 x^2+31 x+25$
- $y^2=71 x^6+74 x^5+49 x^4+53 x^3+38 x^2+47 x+74$
- $y^2=20 x^6+38 x^5+11 x^4+69 x^3+37 x^2+74 x+78$
- and 150 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{79}$.
Endomorphism algebra over $\F_{79}$| The endomorphism algebra of this simple isogeny class is 4.0.4541712.2. |
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 |
|---|---|---|
| 2.79.i_eh | $2$ | (not in LMFDB) |