Invariants
| Base field: | $\F_{79}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 112 x^{2} + 6241 x^{4}$ |
| Frobenius angles: | $\pm0.375395275078$, $\pm0.624604724922$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{-30}, \sqrt{46})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $240$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $6354$ | $40373316$ | $243086763474$ | $1517104058000400$ | $9468276078221531154$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $80$ | $6466$ | $493040$ | $38949958$ | $3077056400$ | $243086071426$ | $19203908986160$ | $1517108965699198$ | $119851595982618320$ | $9468276073816215106$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 240 curves (of which all are hyperelliptic):
- $y^2=44 x^6+40 x^5+11 x^4+x^3+20 x^2+2 x+6$
- $y^2=53 x^6+41 x^5+33 x^4+3 x^3+60 x^2+6 x+18$
- $y^2=60 x^6+38 x^5+3 x^4+x^3+46 x+40$
- $y^2=22 x^6+35 x^5+9 x^4+3 x^3+59 x+41$
- $y^2=73 x^6+31 x^5+49 x^4+69 x^3+13 x^2+65 x+49$
- $y^2=61 x^6+14 x^5+68 x^4+49 x^3+39 x^2+37 x+68$
- $y^2=16 x^6+24 x^5+54 x^4+72 x^3+14 x^2+74 x+16$
- $y^2=48 x^6+72 x^5+4 x^4+58 x^3+42 x^2+64 x+48$
- $y^2=38 x^6+46 x^5+51 x^4+31 x^3+11 x^2+67 x+72$
- $y^2=35 x^6+59 x^5+74 x^4+14 x^3+33 x^2+43 x+58$
- $y^2=45 x^6+71 x^5+7 x^4+x^3+62 x^2+53 x+55$
- $y^2=56 x^6+55 x^5+21 x^4+3 x^3+28 x^2+x+7$
- $y^2=7 x^6+13 x^5+66 x^4+40 x^3+14 x^2+36 x+76$
- $y^2=21 x^6+39 x^5+40 x^4+41 x^3+42 x^2+29 x+70$
- $y^2=68 x^6+74 x^5+40 x^4+37 x^3+50 x^2+28 x+51$
- $y^2=46 x^6+64 x^5+41 x^4+32 x^3+71 x^2+5 x+74$
- $y^2=59 x^6+44 x^5+8 x^4+12 x^3+61 x^2+69 x+3$
- $y^2=19 x^6+53 x^5+24 x^4+36 x^3+25 x^2+49 x+9$
- $y^2=17 x^6+17 x^5+45 x^4+75 x^3+59 x^2+17 x+53$
- $y^2=51 x^6+51 x^5+56 x^4+67 x^3+19 x^2+51 x+1$
- and 220 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{79^{2}}$.
Endomorphism algebra over $\F_{79}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-30}, \sqrt{46})\). |
| The base change of $A$ to $\F_{79^{2}}$ is 1.6241.ei 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-345}) \)$)$ |
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.a_aei | $4$ | (not in LMFDB) |