Invariants
| Base field: | $\F_{71}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 2 x - 10 x^{2} + 142 x^{3} + 5041 x^{4}$ |
| Frobenius angles: | $\pm0.264296801043$, $\pm0.791650804175$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.1176808.2 |
| Galois group: | $D_{4}$ |
| Jacobians: | $360$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5176$ | $25300288$ | $128277372184$ | $646227647383552$ | $3255173117307293656$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $74$ | $5018$ | $358406$ | $25430334$ | $1804190314$ | $128100599354$ | $9095113998310$ | $645753458238910$ | $45848500954861130$ | $3255243549091627418$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 360 curves (of which all are hyperelliptic):
- $y^2=8 x^6+4 x^5+27 x^4+5 x^3+58 x^2+58 x+69$
- $y^2=39 x^6+10 x^5+48 x^4+55 x^3+7 x^2+28 x+2$
- $y^2=16 x^6+55 x^5+24 x^4+34 x^3+30 x^2+31 x$
- $y^2=15 x^6+57 x^5+39 x^4+64 x^3+69 x^2+53 x+45$
- $y^2=39 x^6+4 x^5+49 x^4+12 x^3+44 x^2+62 x+59$
- $y^2=38 x^6+38 x^5+53 x^4+27 x^3+41 x^2+14 x+48$
- $y^2=53 x^6+11 x^5+68 x^4+50 x^3+56 x^2+51 x+27$
- $y^2=57 x^6+54 x^5+52 x^4+5 x^3+20 x^2+60 x+62$
- $y^2=6 x^6+31 x^5+41 x^4+37 x^3+47 x^2+22 x+40$
- $y^2=55 x^6+33 x^5+57 x^4+2 x^3+26 x^2+26 x+52$
- $y^2=51 x^6+14 x^5+51 x^4+64 x^3+20 x^2+24 x+47$
- $y^2=43 x^6+51 x^4+31 x^3+53 x^2+4 x+65$
- $y^2=15 x^6+57 x^5+66 x^4+63 x^3+50 x^2+6 x+43$
- $y^2=36 x^6+60 x^5+12 x^4+51 x^3+63 x^2+15 x+39$
- $y^2=63 x^6+39 x^5+67 x^4+25 x^3+33 x^2+29 x+36$
- $y^2=59 x^6+16 x^5+15 x^4+12 x^3+49 x^2+42 x+8$
- $y^2=44 x^6+9 x^5+35 x^4+27 x^3+14 x^2+38 x+32$
- $y^2=8 x^6+57 x^5+68 x^4+50 x^3+16 x^2+44 x+35$
- $y^2=9 x^5+12 x^4+42 x^3+27 x^2+39 x+26$
- $y^2=61 x^6+30 x^5+6 x^4+29 x^3+19 x^2+x+4$
- and 340 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 4.0.1176808.2. |
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 |
|---|---|---|
| 2.71.ac_ak | $2$ | (not in LMFDB) |