Invariants
| Base field: | $\F_{79}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 4 x - 316 x^{3} + 6241 x^{4}$ |
| Frobenius angles: | $\pm0.189188793212$, $\pm0.706224779239$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-150 +36 \sqrt{2}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $312$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $3$ |
This isogeny class is simple and geometrically simple, primitive, not ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.
Newton polygon
| $p$-rank: | $1$ |
| Slopes: | $[0, 1/2, 1/2, 1]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5922$ | $38860164$ | $242589098178$ | $1517874430704912$ | $9468579226884982722$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $76$ | $6226$ | $492028$ | $38969734$ | $3077154916$ | $243087629650$ | $19203922208596$ | $1517108771279230$ | $119851595268295084$ | $9468276082861111186$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 312 curves (of which all are hyperelliptic):
- $y^2=77 x^5+69 x^4+16 x^3+22 x^2+55$
- $y^2=4 x^6+61 x^5+13 x^4+49 x^3+47 x^2+13 x+14$
- $y^2=35 x^6+59 x^5+73 x^4+20 x^3+43 x^2+20 x+55$
- $y^2=67 x^6+36 x^5+43 x^4+22 x^3+44 x^2+70 x+62$
- $y^2=59 x^6+28 x^5+45 x^4+57 x^3+7 x^2+3 x+78$
- $y^2=7 x^6+2 x^5+32 x^4+74 x^3+65 x^2+61 x+13$
- $y^2=45 x^6+19 x^5+40 x^4+6 x^3+63 x^2+44 x+66$
- $y^2=62 x^6+10 x^5+77 x^4+75 x^3+59 x^2+23 x+28$
- $y^2=29 x^6+29 x^5+44 x^4+4 x^3+58 x^2+67 x+78$
- $y^2=28 x^6+76 x^5+25 x^4+34 x^3+40 x^2+65 x+49$
- $y^2=46 x^6+78 x^5+75 x^4+25 x^3+35 x^2+21 x+2$
- $y^2=34 x^6+48 x^5+13 x^4+41 x^2+37 x+67$
- $y^2=22 x^6+69 x^5+3 x^4+5 x^3+74 x^2+41 x+56$
- $y^2=78 x^6+53 x^5+16 x^4+63 x^3+52 x^2+3 x+33$
- $y^2=35 x^6+25 x^5+24 x^4+75 x^3+18 x^2+6 x+25$
- $y^2=41 x^6+68 x^5+55 x^4+77 x^3+60 x^2+9 x+77$
- $y^2=71 x^6+63 x^5+22 x^4+77 x^3+28 x^2+11 x+55$
- $y^2=38 x^6+65 x^5+11 x^4+67 x^3+22 x^2+9 x+32$
- $y^2=35 x^6+62 x^5+48 x^4+8 x^3+47 x^2+44 x+17$
- $y^2=65 x^6+28 x^5+34 x^4+17 x^3+40 x^2+24 x+6$
- and 292 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 \(\Q(\sqrt{-150 +36 \sqrt{2}})\). |
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 |
|---|---|---|
| 2.79.e_a | $2$ | (not in LMFDB) |