Invariants
| Base field: | $\F_{61}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 7 x + 100 x^{2} + 427 x^{3} + 3721 x^{4}$ |
| Frobenius angles: | $\pm0.451881454382$, $\pm0.704324908154$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.43788077.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $196$ |
| Isomorphism classes: | 196 |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $4256$ | $14419328$ | $51412411904$ | $191709060849152$ | $713305909211597856$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $69$ | $3873$ | $226506$ | $13845969$ | $844552489$ | $51520309734$ | $3142749386685$ | $191707291841025$ | $11694145776485970$ | $713342913436293193$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 196 curves (of which all are hyperelliptic):
- $y^2=42 x^6+3 x^5+10 x^4+11 x^3+56 x^2+5 x+36$
- $y^2=21 x^6+11 x^5+14 x^4+51 x^3+22 x^2+48 x+13$
- $y^2=47 x^6+7 x^5+10 x^4+17 x^3+60 x^2+16 x+2$
- $y^2=58 x^6+15 x^5+31 x^4+57 x^3+45 x^2+37 x+38$
- $y^2=5 x^6+23 x^5+40 x^4+28 x^3+42 x^2+32 x+8$
- $y^2=41 x^6+4 x^5+14 x^4+30 x^3+50 x^2+25 x+23$
- $y^2=51 x^6+30 x^5+17 x^4+28 x^3+16 x+35$
- $y^2=9 x^6+26 x^5+45 x^4+48 x^3+x^2+60 x+36$
- $y^2=48 x^6+24 x^5+17 x^4+24 x^3+24 x^2+19 x+40$
- $y^2=5 x^6+28 x^5+55 x^4+x^2+36 x+46$
- $y^2=14 x^6+10 x^5+45 x^4+45 x^2+23 x+47$
- $y^2=15 x^6+31 x^5+39 x^4+29 x^3+56 x^2+24 x+8$
- $y^2=4 x^6+49 x^5+42 x^4+32 x^3+53 x^2+27 x+10$
- $y^2=41 x^6+24 x^5+58 x^4+42 x^3+25 x^2+39 x+30$
- $y^2=50 x^6+43 x^5+11 x^4+53 x^3+55 x^2+58 x+16$
- $y^2=36 x^6+33 x^5+16 x^4+30 x^3+13 x^2+14 x+38$
- $y^2=42 x^6+4 x^5+42 x^4+18 x^3+32 x^2+50 x+1$
- $y^2=53 x^6+52 x^5+17 x^4+6 x^3+2 x^2+23 x+2$
- $y^2=17 x^6+52 x^5+34 x^4+19 x^3+36 x^2+8 x+42$
- $y^2=60 x^6+36 x^5+14 x^4+57 x^3+32 x^2+28 x+15$
- and 176 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{61}$.
Endomorphism algebra over $\F_{61}$| The endomorphism algebra of this simple isogeny class is 4.0.43788077.1. |
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 |
|---|---|---|
| 2.61.ah_dw | $2$ | (not in LMFDB) |