Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 112 x^{2} + 6889 x^{4}$ |
| Frobenius angles: | $\pm0.367863234133$, $\pm0.632136765867$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{6}, \sqrt{-278})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $312$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7002$ | $49028004$ | $326939463594$ | $2252409455717136$ | $15516041183013185082$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $84$ | $7114$ | $571788$ | $47460790$ | $3939040644$ | $326938553818$ | $27136050989628$ | $2252292418926814$ | $186940255267540404$ | $15516041178820516714$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 312 curves (of which all are hyperelliptic):
- $y^2=x^6+50 x^5+18 x^4+70 x^3+7 x^2+6 x+23$
- $y^2=2 x^6+17 x^5+36 x^4+57 x^3+14 x^2+12 x+46$
- $y^2=14 x^6+55 x^5+36 x^4+63 x^3+17 x^2+82 x+30$
- $y^2=28 x^6+27 x^5+72 x^4+43 x^3+34 x^2+81 x+60$
- $y^2=5 x^6+42 x^5+29 x^4+71 x^3+13 x^2+59 x+7$
- $y^2=10 x^6+x^5+58 x^4+59 x^3+26 x^2+35 x+14$
- $y^2=78 x^6+76 x^5+44 x^4+27 x^3+27 x^2+12 x+74$
- $y^2=73 x^6+69 x^5+5 x^4+54 x^3+54 x^2+24 x+65$
- $y^2=19 x^6+x^5+14 x^4+24 x^3+71 x^2+61 x+54$
- $y^2=38 x^6+2 x^5+28 x^4+48 x^3+59 x^2+39 x+25$
- $y^2=37 x^6+56 x^5+44 x^4+22 x^3+23 x^2+33 x+44$
- $y^2=74 x^6+29 x^5+5 x^4+44 x^3+46 x^2+66 x+5$
- $y^2=67 x^6+63 x^5+2 x^4+2 x^3+19 x^2+75 x+51$
- $y^2=51 x^6+43 x^5+4 x^4+4 x^3+38 x^2+67 x+19$
- $y^2=17 x^6+51 x^5+32 x^4+35 x^3+59 x^2+56 x+76$
- $y^2=34 x^6+19 x^5+64 x^4+70 x^3+35 x^2+29 x+69$
- $y^2=58 x^6+33 x^5+48 x^4+45 x^3+21 x^2+26 x+8$
- $y^2=33 x^6+66 x^5+13 x^4+7 x^3+42 x^2+52 x+16$
- $y^2=49 x^6+45 x^5+62 x^4+2 x^3+63 x^2+46 x+7$
- $y^2=15 x^6+7 x^5+41 x^4+4 x^3+43 x^2+9 x+14$
- and 292 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{83^{2}}$.
Endomorphism algebra over $\F_{83}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{6}, \sqrt{-278})\). |
| The base change of $A$ to $\F_{83^{2}}$ is 1.6889.ei 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-417}) \)$)$ |
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 |
|---|---|---|
| 2.83.a_aei | $4$ | (not in LMFDB) |