Invariants
| Base field: | $\F_{79}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 8 x + 79 x^{2} )( 1 + 79 x^{2} )$ |
| $1 - 8 x + 158 x^{2} - 632 x^{3} + 6241 x^{4}$ | |
| Frobenius angles: | $\pm0.351411445414$, $\pm0.5$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $450$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5760$ | $40550400$ | $243770808960$ | $1516764679372800$ | $9468029407323484800$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $72$ | $6494$ | $494424$ | $38941246$ | $3076976232$ | $243087512222$ | $19203907884408$ | $1517108796613246$ | $119851596586511496$ | $9468276088508164574$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 450 curves (of which all are hyperelliptic):
- $y^2=55 x^6+27 x^5+64 x^4+44 x^3+13 x^2+74 x+2$
- $y^2=8 x^6+18 x^5+77 x^4+11 x^3+77 x^2+18 x+8$
- $y^2=39 x^6+21 x^5+21 x^4+75 x^3+49 x^2+53 x+34$
- $y^2=2 x^6+64 x^5+23 x^4+49 x^3+54 x^2+37$
- $y^2=12 x^6+28 x^5+14 x^4+58 x^3+8 x^2+x+68$
- $y^2=7 x^6+57 x^5+10 x^4+32 x^3+29 x^2+29 x$
- $y^2=39 x^6+58 x^5+64 x^4+72 x^3+2 x^2+7 x+7$
- $y^2=27 x^6+22 x^5+10 x^4+29 x^3+10 x^2+22 x+27$
- $y^2=23 x^6+30 x^5+55 x^4+21 x^3+9 x^2+56 x+1$
- $y^2=56 x^6+27 x^5+22 x^4+17 x^3+29 x^2+11 x+72$
- $y^2=31 x^6+70 x^5+34 x^4+24 x^3+71 x^2+26 x+67$
- $y^2=26 x^6+45 x^5+13 x^4+19 x^3+5 x^2+52 x+70$
- $y^2=18 x^6+63 x^5+58 x^4+49 x^3+46 x^2+9 x+20$
- $y^2=9 x^6+36 x^5+50 x^4+48 x^3+18 x^2+x+23$
- $y^2=13 x^6+58 x^5+64 x^4+51 x^3+64 x^2+58 x+13$
- $y^2=17 x^6+16 x^5+35 x^4+28 x^3+17 x^2+76 x+31$
- $y^2=61 x^6+51 x^5+40 x^4+48 x^3+50 x^2+55 x+71$
- $y^2=24 x^6+32 x^5+29 x^4+49 x^3+29 x^2+32 x+24$
- $y^2=41 x^6+50 x^4+24 x^3+27 x^2+2 x+9$
- $y^2=64 x^6+70 x^5+61 x^4+69 x^3+61 x^2+70 x+64$
- 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.ai $\times$ 1.79.a 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.i_gc | $2$ | (not in LMFDB) |