Invariants
| Base field: | $\F_{61}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 10 x + 102 x^{2} - 610 x^{3} + 3721 x^{4}$ |
| Frobenius angles: | $\pm0.230274281960$, $\pm0.534879027157$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-174 +30 \sqrt{5}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $336$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $3204$ | $14238576$ | $51572868804$ | $191713882694400$ | $713412129583493604$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $52$ | $3826$ | $227212$ | $13846318$ | $844678252$ | $51520898626$ | $3142739154292$ | $191707270923358$ | $11694146062496452$ | $713342911454404306$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 336 curves (of which all are hyperelliptic):
- $y^2=52 x^6+43 x^5+59 x^4+18 x^3+22 x^2+30 x+9$
- $y^2=34 x^6+54 x^5+19 x^4+x^3+42 x^2+54 x+57$
- $y^2=25 x^6+34 x^5+6 x^4+46 x^3+24 x^2+36 x+36$
- $y^2=40 x^6+20 x^5+34 x^4+46 x^3+26 x^2+25 x+3$
- $y^2=52 x^6+47 x^5+24 x^4+25 x^3+19 x^2+13 x+23$
- $y^2=12 x^6+17 x^5+54 x^4+6 x^3+21 x^2+15 x+4$
- $y^2=30 x^6+17 x^5+52 x^3+36 x^2+24 x+23$
- $y^2=7 x^6+52 x^5+4 x^4+14 x^3+12 x^2+50 x+30$
- $y^2=12 x^6+x^5+54 x^4+40 x^3+34 x^2+5 x+48$
- $y^2=33 x^6+18 x^5+5 x^4+2 x^3+45 x^2+12 x$
- $y^2=59 x^6+11 x^5+18 x^4+20 x^3+15 x^2+27 x+31$
- $y^2=32 x^6+44 x^5+x^4+48 x^3+29 x^2+21 x+8$
- $y^2=48 x^6+24 x^5+3 x^4+59 x^3+10 x^2+41 x+37$
- $y^2=17 x^6+23 x^5+55 x^4+15 x^3+24 x^2+30 x+22$
- $y^2=59 x^6+7 x^5+39 x^4+19 x^3+31 x^2+58 x+7$
- $y^2=4 x^6+53 x^5+60 x^4+40 x^3+2 x^2+24 x+28$
- $y^2=36 x^6+33 x^5+32 x^4+28 x^3+47 x^2+13 x+60$
- $y^2=60 x^5+31 x^4+25 x^3+60 x^2+41 x+53$
- $y^2=15 x^6+26 x^5+12 x^4+13 x^3+22 x^2+26 x$
- $y^2=19 x^6+14 x^5+14 x^4+48 x^3+3 x^2+3 x+37$
- and 316 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 \(\Q(\sqrt{-174 +30 \sqrt{5}})\). |
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.k_dy | $2$ | (not in LMFDB) |