Invariants
| Base field: | $\F_{61}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 102 x^{2} + 3721 x^{4}$ |
| Frobenius angles: | $\pm0.407574879409$, $\pm0.592425120591$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{5}, \sqrt{-14})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $298$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
This isogeny class is simple but not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $3824$ | $14622976$ | $51520296944$ | $191625326694400$ | $713342910021294704$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $62$ | $3926$ | $226982$ | $13839918$ | $844596302$ | $51520219526$ | $3142742836022$ | $191707350833758$ | $11694146092834142$ | $713342908379706806$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 298 curves (of which all are hyperelliptic):
- $y^2=60 x^6+28 x^5+34 x^4+58 x^3+58 x^2+39 x+26$
- $y^2=59 x^6+56 x^5+7 x^4+55 x^3+55 x^2+17 x+52$
- $y^2=20 x^6+33 x^5+9 x^4+32 x^3+7 x^2+4 x+4$
- $y^2=12 x^6+32 x^5+14 x^4+53 x^3+8 x^2+3 x+28$
- $y^2=24 x^6+3 x^5+28 x^4+45 x^3+16 x^2+6 x+56$
- $y^2=2 x^6+52 x^5+43 x^4+35 x^3+46 x^2+51 x+53$
- $y^2=4 x^6+43 x^5+25 x^4+9 x^3+31 x^2+41 x+45$
- $y^2=58 x^6+21 x^5+28 x^4+24 x^3+37 x^2+50 x+36$
- $y^2=55 x^6+42 x^5+56 x^4+48 x^3+13 x^2+39 x+11$
- $y^2=36 x^6+22 x^5+56 x^4+27 x^3+37 x^2+6 x+29$
- $y^2=11 x^6+44 x^5+51 x^4+54 x^3+13 x^2+12 x+58$
- $y^2=44 x^6+50 x^5+30 x^4+11 x^3+x^2+34 x+18$
- $y^2=3 x^6+59 x^5+55 x^4+19 x^3+23 x^2+16 x+35$
- $y^2=6 x^6+57 x^5+49 x^4+38 x^3+46 x^2+32 x+9$
- $y^2=49 x^6+22 x^5+56 x^4+38 x^3+25 x^2+24 x+46$
- $y^2=37 x^6+44 x^5+51 x^4+15 x^3+50 x^2+48 x+31$
- $y^2=4 x^6+6 x^5+6 x^4+36 x^3+24 x^2+19 x+9$
- $y^2=8 x^6+12 x^5+12 x^4+11 x^3+48 x^2+38 x+18$
- $y^2=13 x^6+39 x^5+42 x^4+16 x^3+27 x^2+60 x+25$
- $y^2=26 x^6+17 x^5+23 x^4+32 x^3+54 x^2+59 x+50$
- and 278 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{61^{2}}$.
Endomorphism algebra over $\F_{61}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{5}, \sqrt{-14})\). |
| The base change of $A$ to $\F_{61^{2}}$ is 1.3721.dy 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-70}) \)$)$ |
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.a_ady | $4$ | (not in LMFDB) |