Invariants
| Base field: | $\F_{61}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 12 x + 61 x^{2} )( 1 + 10 x + 61 x^{2} )$ |
| $1 - 2 x + 2 x^{2} - 122 x^{3} + 3721 x^{4}$ | |
| Frobenius angles: | $\pm0.221142061624$, $\pm0.721142061624$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $289$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3, 5$ |
This isogeny class is not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $3600$ | $13852800$ | $51438272400$ | $191900067840000$ | $713373316088490000$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $60$ | $3722$ | $226620$ | $13859758$ | $844632300$ | $51520374362$ | $3142745808780$ | $191707271553118$ | $11694145870051740$ | $713342911662882602$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 289 curves (of which all are hyperelliptic):
- $y^2=12 x^6+18 x^5+51 x^4+27 x^3+51 x^2+50 x+3$
- $y^2=55 x^6+30 x^5+13 x^4+50 x^3+20 x^2+6 x+40$
- $y^2=57 x^6+18 x^5+49 x^4+20 x^3+26 x^2+31 x+27$
- $y^2=52 x^6+19 x^5+23 x^4+2 x^3+52 x^2+52$
- $y^2=31 x^6+31 x^5+26 x^4+28 x^3+42 x^2+60 x+59$
- $y^2=28 x^6+35 x^5+8 x^4+18 x^3+55 x^2+17 x+38$
- $y^2=16 x^5+47 x^4+32 x^3+16 x^2+12 x+45$
- $y^2=56 x^6+25 x^5+18 x^4+48 x^3+6 x^2+32 x$
- $y^2=17 x^6+20 x^5+23 x^4+25 x^3+29 x^2+7 x+1$
- $y^2=7 x^6+36 x^5+57 x^4+37 x^3+39 x^2+44 x+9$
- $y^2=22 x^6+10 x^5+59 x^4+18 x^2+21 x+19$
- $y^2=4 x^6+58 x^5+3 x^4+57 x^3+18 x^2+17 x+16$
- $y^2=19 x^6+9 x^5+20 x^4+12 x^3+31 x^2+x+24$
- $y^2=50 x^6+25 x^5+13 x^4+35 x^3+26 x^2+42 x+3$
- $y^2=55 x^6+10 x^5+43 x^4+4 x^3+37 x^2+25 x+18$
- $y^2=57 x^6+29 x^5+52 x^4+46 x^3+26 x^2+44 x+40$
- $y^2=50 x^6+2 x^5+46 x^4+41 x^3+15 x^2+33 x+36$
- $y^2=52 x^6+9 x^5+44 x^4+59 x^3+7 x^2+13 x+5$
- $y^2=33 x^6+31 x^5+44 x^4+18 x^3+39 x^2+43 x+9$
- $y^2=20 x^6+38 x^5+38 x^4+57 x^3+50 x^2+41 x+45$
- and 269 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{61^{4}}$.
Endomorphism algebra over $\F_{61}$| The isogeny class factors as 1.61.am $\times$ 1.61.k and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
| The base change of $A$ to $\F_{61^{4}}$ is 1.13845841.khq 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-1}) \)$)$ |
- Endomorphism algebra over $\F_{61^{2}}$
The base change of $A$ to $\F_{61^{2}}$ is 1.3721.aw $\times$ 1.3721.w. The endomorphism algebra for each factor is:
Base change
This is a primitive isogeny class.