Invariants
| Base field: | $\F_{47}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 8 x + 30 x^{2} - 376 x^{3} + 2209 x^{4}$ |
| Frobenius angles: | $\pm0.106974335895$, $\pm0.617427396216$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.5225.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $160$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $1856$ | $4870144$ | $10684102976$ | $23804406726656$ | $52606580082185536$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $40$ | $2206$ | $102904$ | $4878270$ | $229377480$ | $10779180382$ | $506623368088$ | $23811305019774$ | $1119130527667048$ | $52599132291910686$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 160 curves (of which all are hyperelliptic):
- $y^2=43 x^6+8 x^5+30 x^4+24 x^3+20 x^2+28 x+19$
- $y^2=21 x^6+14 x^5+21 x^4+4 x^3+7 x^2+33 x+35$
- $y^2=2 x^6+33 x^5+31 x^4+40 x^3+21 x^2+4 x+44$
- $y^2=35 x^6+21 x^5+32 x^4+22 x^3+3 x^2+3 x+30$
- $y^2=25 x^6+46 x^5+36 x^4+23 x^3+11 x^2+26 x+19$
- $y^2=5 x^6+32 x^5+33 x^4+36 x^3+26 x^2+22 x+28$
- $y^2=41 x^6+20 x^5+22 x^4+x^3+19 x^2+21 x+28$
- $y^2=12 x^6+43 x^5+8 x^4+14 x^3+35 x^2+29 x+31$
- $y^2=6 x^6+42 x^5+43 x^4+26 x^3+13 x^2+x+31$
- $y^2=14 x^6+11 x^5+12 x^4+25 x^3+10 x^2+16 x+4$
- $y^2=14 x^6+24 x^5+44 x^4+43 x^3+20 x^2+34 x+17$
- $y^2=33 x^6+3 x^5+33 x^4+2 x^3+21 x^2+24 x$
- $y^2=5 x^6+20 x^5+33 x^4+26 x^3+46 x^2+8 x+13$
- $y^2=46 x^6+20 x^5+12 x^4+44 x^3+30 x^2+44 x+21$
- $y^2=45 x^6+9 x^5+2 x^4+33 x^3+43 x^2+42 x+40$
- $y^2=25 x^6+32 x^5+37 x^4+20 x^3+x^2+22 x+38$
- $y^2=42 x^6+7 x^5+x^4+5 x^3+26 x^2+41 x+6$
- $y^2=32 x^6+23 x^5+30 x^3+24 x^2+31 x$
- $y^2=24 x^6+17 x^5+41 x^4+42 x^3+28 x^2+29 x+36$
- $y^2=22 x^6+3 x^5+13 x^4+8 x^3+39 x^2+10 x+35$
- and 140 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{47}$.
Endomorphism algebra over $\F_{47}$| The endomorphism algebra of this simple isogeny class is 4.0.5225.1. |
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 |
|---|---|---|
| 2.47.i_be | $2$ | (not in LMFDB) |