Invariants
| Base field: | $\F_{71}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 4 x + 118 x^{2} - 284 x^{3} + 5041 x^{4}$ |
| Frobenius angles: | $\pm0.357571148213$, $\pm0.562572837874$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.12358976.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $308$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $4872$ | $26542656$ | $128279180232$ | $645628236051456$ | $3255250615260320712$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $68$ | $5262$ | $358412$ | $25406750$ | $1804233268$ | $128099914542$ | $9095114297596$ | $645753577363774$ | $45848501469850532$ | $3255243548771140302$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 308 curves (of which all are hyperelliptic):
- $y^2=46 x^6+57 x^5+46 x^4+19 x^3+24 x^2+56 x+67$
- $y^2=28 x^6+9 x^5+36 x^4+58 x^3+47 x^2+51 x+53$
- $y^2=21 x^6+57 x^5+23 x^4+24 x^3+42 x^2+44 x+8$
- $y^2=8 x^6+9 x^5+42 x^4+41 x^3+46 x^2+x+36$
- $y^2=18 x^6+30 x^5+63 x^4+70 x^3+48 x^2+24 x+12$
- $y^2=69 x^6+56 x^5+30 x^4+20 x^3+36 x^2+69 x+63$
- $y^2=23 x^6+67 x^5+64 x^4+67 x^3+51 x^2+29 x+21$
- $y^2=17 x^6+17 x^5+10 x^4+46 x^3+61 x^2+38 x+49$
- $y^2=15 x^6+37 x^5+18 x^4+15 x^3+28 x^2+36 x+12$
- $y^2=45 x^6+60 x^5+42 x^4+41 x^3+70 x^2+9 x+33$
- $y^2=29 x^6+7 x^5+5 x^4+70 x^3+54 x^2+30 x+58$
- $y^2=60 x^6+43 x^5+30 x^4+60 x^3+15 x^2+5 x+64$
- $y^2=35 x^6+47 x^5+44 x^3+48 x^2+35 x+63$
- $y^2=40 x^6+40 x^5+66 x^4+4 x^3+50 x^2+17 x+44$
- $y^2=22 x^6+4 x^5+47 x^4+3 x^3+41 x^2+48 x+68$
- $y^2=31 x^6+36 x^5+53 x^4+57 x^3+35 x^2+19 x+47$
- $y^2=52 x^6+4 x^5+35 x^4+12 x^3+33 x^2+48 x+69$
- $y^2=6 x^6+12 x^5+32 x^4+23 x^3+14 x^2+14 x+10$
- $y^2=38 x^6+25 x^5+12 x^4+42 x^3+20 x^2+43 x+40$
- $y^2=31 x^5+8 x^4+4 x^3+24 x^2+61 x+16$
- and 288 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{71}$.
Endomorphism algebra over $\F_{71}$| The endomorphism algebra of this simple isogeny class is 4.0.12358976.1. |
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 |
|---|---|---|
| 2.71.e_eo | $2$ | (not in LMFDB) |