Invariants
| Base field: | $\F_{79}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 8 x + 142 x^{2} + 632 x^{3} + 6241 x^{4}$ |
| Frobenius angles: | $\pm0.470288696372$, $\pm0.682802816445$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.5696.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $378$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7024$ | $40345856$ | $242594862832$ | $1516979009785856$ | $9468213586133488624$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $88$ | $6462$ | $492040$ | $38946750$ | $3077036088$ | $243087350142$ | $19203921060328$ | $1517108761909374$ | $119851594845431320$ | $9468276091566746302$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 378 curves (of which all are hyperelliptic):
- $y^2=19 x^6+15 x^5+75 x^4+66 x^3+56 x^2+51 x+16$
- $y^2=30 x^6+14 x^5+28 x^4+15 x^3+16 x^2+48 x+69$
- $y^2=54 x^6+73 x^5+74 x^4+20 x^3+72 x^2+5 x+2$
- $y^2=67 x^6+60 x^5+67 x^4+74 x^2+52 x+36$
- $y^2=42 x^6+13 x^5+51 x^4+70 x^3+6 x^2+22 x+42$
- $y^2=48 x^6+18 x^5+12 x^4+57 x^3+23 x^2+x+34$
- $y^2=69 x^6+20 x^5+58 x^4+34 x^3+73 x^2+36 x+61$
- $y^2=54 x^6+6 x^5+45 x^4+29 x^3+26 x^2+19 x+64$
- $y^2=50 x^6+40 x^5+62 x^4+46 x^3+72 x^2+23 x+73$
- $y^2=73 x^6+33 x^5+28 x^4+27 x^3+70 x^2+56 x+78$
- $y^2=74 x^6+49 x^5+66 x^4+44 x^3+77 x+54$
- $y^2=13 x^6+19 x^5+56 x^4+78 x^3+65 x^2+38 x+45$
- $y^2=45 x^6+32 x^5+76 x^4+38 x^3+16 x^2+45 x+24$
- $y^2=68 x^6+25 x^5+48 x^4+59 x^3+75 x^2+23 x+68$
- $y^2=55 x^6+32 x^5+62 x^4+45 x^3+53 x^2+64 x+43$
- $y^2=4 x^6+59 x^5+10 x^4+48 x^3+8 x^2+44 x+50$
- $y^2=63 x^6+33 x^5+76 x^4+60 x^3+40 x^2+39 x+48$
- $y^2=10 x^6+35 x^5+6 x^4+78 x^3+11 x^2+20 x+48$
- $y^2=21 x^6+5 x^5+73 x^4+30 x^3+50 x^2+17 x+70$
- $y^2=12 x^6+57 x^5+47 x^4+74 x^3+37 x^2+47 x+54$
- and 358 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 4.0.5696.1. |
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.ai_fm | $2$ | (not in LMFDB) |