Invariants
| Base field: | $\F_{79}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 + 79 x^{2} )( 1 + 8 x + 79 x^{2} )$ |
| $1 + 8 x + 158 x^{2} + 632 x^{3} + 6241 x^{4}$ | |
| Frobenius angles: | $\pm0.5$, $\pm0.648588554586$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $450$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
This isogeny class is not simple, primitive, not ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.
Newton polygon
| $p$-rank: | $1$ |
| Slopes: | $[0, 1/2, 1/2, 1]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7040$ | $40550400$ | $242406074240$ | $1516764679372800$ | $9468522770238435200$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $88$ | $6494$ | $491656$ | $38941246$ | $3077136568$ | $243087512222$ | $19203910087912$ | $1517108796613246$ | $119851595378725144$ | $9468276088508164574$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 450 curves (of which all are hyperelliptic):
- $y^2=71 x^6+9 x^5+74 x^4+41 x^3+57 x^2+51 x+27$
- $y^2=29 x^6+6 x^5+52 x^4+30 x^3+52 x^2+6 x+29$
- $y^2=38 x^6+63 x^5+63 x^4+67 x^3+68 x^2+x+23$
- $y^2=6 x^6+34 x^5+69 x^4+68 x^3+4 x^2+32$
- $y^2=4 x^6+62 x^5+31 x^4+72 x^3+29 x^2+53 x+49$
- $y^2=21 x^6+13 x^5+30 x^4+17 x^3+8 x^2+8 x$
- $y^2=38 x^6+16 x^5+34 x^4+58 x^3+6 x^2+21 x+21$
- $y^2=9 x^6+60 x^5+56 x^4+36 x^3+56 x^2+60 x+9$
- $y^2=69 x^6+11 x^5+7 x^4+63 x^3+27 x^2+10 x+3$
- $y^2=45 x^6+9 x^5+60 x^4+32 x^3+36 x^2+30 x+24$
- $y^2=14 x^6+52 x^5+23 x^4+72 x^3+55 x^2+78 x+43$
- $y^2=35 x^6+15 x^5+57 x^4+59 x^3+28 x^2+70 x+76$
- $y^2=54 x^6+31 x^5+16 x^4+68 x^3+59 x^2+27 x+60$
- $y^2=3 x^6+12 x^5+43 x^4+16 x^3+6 x^2+53 x+34$
- $y^2=39 x^6+16 x^5+34 x^4+74 x^3+34 x^2+16 x+39$
- $y^2=32 x^6+58 x^5+38 x^4+62 x^3+32 x^2+78 x+63$
- $y^2=73 x^6+17 x^5+66 x^4+16 x^3+43 x^2+71 x+50$
- $y^2=8 x^6+37 x^5+36 x^4+69 x^3+36 x^2+37 x+8$
- $y^2=44 x^6+71 x^4+72 x^3+2 x^2+6 x+27$
- $y^2=34 x^6+52 x^5+25 x^4+49 x^3+25 x^2+52 x+34$
- and 430 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{79^{2}}$.
Endomorphism algebra over $\F_{79}$| The isogeny class factors as 1.79.a $\times$ 1.79.i 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 $\F_{79^{2}}$ is 1.6241.dq $\times$ 1.6241.gc. The endomorphism algebra for each factor is:
|
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 |
|---|---|---|
| 2.79.ai_gc | $2$ | (not in LMFDB) |