Invariants
| Base field: | $\F_{47}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 6 x + 38 x^{2} + 282 x^{3} + 2209 x^{4}$ |
| Frobenius angles: | $\pm0.379630676201$, $\pm0.798801462028$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-114 +6 \sqrt{65}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $280$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2536$ | $4970560$ | $10818548104$ | $23827671705600$ | $52585594411984456$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $54$ | $2250$ | $104202$ | $4883038$ | $229285974$ | $10779247050$ | $506623392042$ | $23811293061118$ | $1119130545847734$ | $52599131409530250$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 280 curves (of which all are hyperelliptic):
- $y^2=17 x^6+23 x^5+41 x^4+45 x^3+31 x^2+27$
- $y^2=8 x^6+42 x^5+18 x^4+26 x^3+28 x^2+26 x+33$
- $y^2=10 x^6+8 x^5+28 x^4+24 x^3+19 x^2+36 x+24$
- $y^2=28 x^6+46 x^5+22 x^4+46 x^3+12 x^2+39 x+44$
- $y^2=4 x^6+44 x^5+6 x^4+20 x^3+26 x^2+44 x+32$
- $y^2=39 x^6+2 x^5+41 x^4+10 x^3+x^2+33 x+20$
- $y^2=19 x^6+18 x^5+20 x^4+3 x^3+6 x^2+21 x$
- $y^2=21 x^6+x^5+2 x^4+40 x^3+24 x^2+42 x+37$
- $y^2=28 x^5+18 x^4+21 x^3+14 x^2+20 x+9$
- $y^2=4 x^5+12 x^4+37 x^3+14 x^2+24 x+3$
- $y^2=37 x^6+26 x^5+41 x^4+30 x^3+15 x^2+33 x+15$
- $y^2=14 x^6+29 x^5+38 x^4+38 x^3+19 x^2+28 x+14$
- $y^2=24 x^6+3 x^5+27 x^3+5 x^2+40$
- $y^2=41 x^6+42 x^5+21 x^4+8 x^3+34 x^2+28 x+45$
- $y^2=27 x^6+31 x^4+28 x^3+35 x^2+5$
- $y^2=9 x^6+9 x^5+32 x^4+31 x^3+34 x^2+12 x+11$
- $y^2=46 x^6+2 x^5+33 x^4+36 x^3+6 x^2+6 x+4$
- $y^2=15 x^6+10 x^5+13 x^4+8 x^3+8 x^2+34 x+21$
- $y^2=16 x^6+5 x^5+26 x^4+21 x^3+46 x^2+2 x+24$
- $y^2=39 x^6+43 x^5+8 x^4+42 x^3+29 x^2+22 x+2$
- and 260 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 \(\Q(\sqrt{-114 +6 \sqrt{65}})\). |
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.ag_bm | $2$ | (not in LMFDB) |