Invariants
| Base field: | $\F_{79}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 + 79 x^{2} )( 1 + 10 x + 79 x^{2} )$ |
| $1 + 10 x + 158 x^{2} + 790 x^{3} + 6241 x^{4}$ | |
| Frobenius angles: | $\pm0.5$, $\pm0.690177289346$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $400$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3, 5$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7200$ | $40320000$ | $242412976800$ | $1516977745920000$ | $9468328552592580000$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $90$ | $6458$ | $491670$ | $38946718$ | $3077073450$ | $243087550778$ | $19203916547430$ | $1517108726768638$ | $119851595437655610$ | $9468276094644370298$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 400 curves (of which all are hyperelliptic):
- $y^2=x^6+15 x^5+70 x^4+70 x^3+10 x^2+78 x+47$
- $y^2=51 x^6+52 x^5+45 x^4+18 x^3+68 x^2+46 x$
- $y^2=77 x^6+59 x^5+15 x^4+28 x^3+18 x^2+21 x+50$
- $y^2=37 x^6+71 x^5+7 x^4+28 x^3+27 x^2+14 x+31$
- $y^2=44 x^6+15 x^5+30 x^4+38 x^3+6 x^2+48 x+25$
- $y^2=24 x^6+12 x^5+69 x^4+75 x^3+69 x^2+12 x+24$
- $y^2=76 x^6+36 x^5+53 x^4+21 x^3+63 x^2+45 x+22$
- $y^2=16 x^6+15 x^5+24 x^4+53 x^3+67 x^2+18 x+50$
- $y^2=7 x^6+39 x^5+22 x^4+50 x^3+16 x^2+30 x+15$
- $y^2=30 x^6+78 x^5+65 x^4+59 x^3+6 x^2+49 x+27$
- $y^2=18 x^6+20 x^5+48 x^4+63 x^3+37 x^2+40 x+8$
- $y^2=16 x^6+33 x^5+49 x^4+55 x^3+49 x^2+33 x+16$
- $y^2=52 x^6+56 x^5+51 x^4+12 x^3+x^2+5 x+63$
- $y^2=76 x^6+65 x^5+60 x^4+72 x^3+67 x^2+25 x+75$
- $y^2=68 x^6+67 x^5+60 x^4+74 x^3+5 x^2+55 x+21$
- $y^2=24 x^6+51 x^5+47 x^4+75 x^3+16 x^2+69 x+34$
- $y^2=78 x^6+x^5+48 x^4+27 x^3+47 x^2+71 x+37$
- $y^2=56 x^6+61 x^5+16 x^4+21 x^3+13 x^2+6 x+59$
- $y^2=52 x^6+16 x^5+19 x^4+78 x^3+73 x^2+37 x+24$
- $y^2=44 x^6+33 x^5+19 x^4+29 x^3+52 x^2+5 x+69$
- and 380 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.k 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.cg $\times$ 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.ak_gc | $2$ | (not in LMFDB) |