Invariants
| Base field: | $\F_{79}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 18 x^{2} + 6241 x^{4}$ |
| Frobenius angles: | $\pm0.231828972673$, $\pm0.768171027327$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{11}, \sqrt{-35})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $404$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $6224$ | $38738176$ | $243087786704$ | $1518056145817600$ | $9468276079301437904$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $80$ | $6206$ | $493040$ | $38974398$ | $3077056400$ | $243088117886$ | $19203908986160$ | $1517108670072958$ | $119851595982618320$ | $9468276075976028606$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 404 curves (of which all are hyperelliptic):
- $y^2=59 x^6+65 x^5+66 x^4+33 x^3+45 x^2+55 x+72$
- $y^2=19 x^6+37 x^5+40 x^4+20 x^3+56 x^2+7 x+58$
- $y^2=35 x^6+43 x^5+62 x^4+40 x^3+23 x^2+46 x+25$
- $y^2=26 x^6+50 x^5+28 x^4+41 x^3+69 x^2+59 x+75$
- $y^2=16 x^6+35 x^5+73 x^4+67 x^3+40 x^2+24 x+8$
- $y^2=15 x^6+44 x^5+11 x^4+31 x^3+41 x^2+19 x+67$
- $y^2=45 x^6+53 x^5+33 x^4+14 x^3+44 x^2+57 x+43$
- $y^2=30 x^6+40 x^5+35 x^4+59 x^3+5 x^2+2 x+63$
- $y^2=65 x^6+57 x^5+31 x^4+76 x^3+33 x^2+67 x+18$
- $y^2=37 x^6+13 x^5+14 x^4+70 x^3+20 x^2+43 x+54$
- $y^2=41 x^6+58 x^5+71 x^4+77 x^3+39 x^2+57 x+43$
- $y^2=44 x^6+16 x^5+55 x^4+73 x^3+38 x^2+13 x+50$
- $y^2=35 x^6+16 x^5+2 x^4+35 x^3+6 x^2+27 x+3$
- $y^2=26 x^6+48 x^5+6 x^4+26 x^3+18 x^2+2 x+9$
- $y^2=31 x^6+55 x^5+10 x^4+59 x^3+20 x^2+12 x+25$
- $y^2=14 x^6+7 x^5+30 x^4+19 x^3+60 x^2+36 x+75$
- $y^2=39 x^6+77 x^5+77 x^4+40 x^3+2 x^2+57 x+31$
- $y^2=38 x^6+73 x^5+73 x^4+41 x^3+6 x^2+13 x+14$
- $y^2=76 x^6+23 x^5+35 x^4+69 x^3+68 x^2+33 x+5$
- $y^2=70 x^6+69 x^5+26 x^4+49 x^3+46 x^2+20 x+15$
- and 384 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 \(\Q(\sqrt{11}, \sqrt{-35})\). |
| The base change of $A$ to $\F_{79^{2}}$ is 1.6241.as 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-385}) \)$)$ |
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_s | $4$ | (not in LMFDB) |