Invariants
| Base field: | $\F_{79}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 10 x + 130 x^{2} + 790 x^{3} + 6241 x^{4}$ |
| Frobenius angles: | $\pm0.459058809679$, $\pm0.742745965286$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-238 +10 \sqrt{53}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $264$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7172$ | $39962384$ | $242826570932$ | $1517169670666496$ | $9467858998377840852$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $90$ | $6402$ | $492510$ | $38951646$ | $3076920850$ | $243088027842$ | $19203922956630$ | $1517108693123838$ | $119851595728119210$ | $9468276085745072002$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 264 curves (of which all are hyperelliptic):
- $y^2=60 x^6+38 x^5+21 x^4+34 x^3+18 x^2+75 x+1$
- $y^2=10 x^6+55 x^5+33 x^4+60 x^3+14 x^2+19 x+71$
- $y^2=76 x^6+36 x^5+44 x^4+70 x^3+6 x^2+50 x+52$
- $y^2=50 x^6+40 x^5+46 x^4+60 x^3+35 x+17$
- $y^2=7 x^6+72 x^5+61 x^4+65 x^3+28 x^2+17 x+29$
- $y^2=18 x^6+45 x^5+72 x^4+77 x^3+4 x^2+41 x+9$
- $y^2=46 x^6+22 x^5+14 x^4+15 x^3+13 x^2+56 x+75$
- $y^2=18 x^6+63 x^5+58 x^4+26 x^3+2 x^2+65 x+3$
- $y^2=13 x^6+73 x^5+10 x^4+16 x^3+7 x^2+75 x+51$
- $y^2=55 x^6+38 x^5+3 x^4+49 x^3+44 x^2+28 x+12$
- $y^2=57 x^6+50 x^5+57 x^4+6 x^3+38 x^2+37 x+4$
- $y^2=73 x^6+52 x^5+28 x^4+54 x^3+12 x^2+46 x+2$
- $y^2=65 x^6+51 x^5+51 x^4+22 x^3+11 x^2+x+25$
- $y^2=3 x^6+69 x^5+74 x^4+37 x^3+3 x^2+27 x+78$
- $y^2=37 x^6+76 x^5+56 x^4+54 x^3+43 x^2+77 x+21$
- $y^2=40 x^6+72 x^5+49 x^4+51 x^3+77 x^2+9 x+70$
- $y^2=39 x^6+69 x^5+37 x^4+65 x^3+9 x^2+13 x+34$
- $y^2=45 x^6+20 x^5+11 x^4+9 x^3+20 x^2+33 x+29$
- $y^2=33 x^6+x^5+55 x^4+47 x^3+49 x^2+32 x+43$
- $y^2=20 x^6+65 x^5+4 x^4+17 x^3+71 x^2+x+25$
- and 244 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{79}$.
Endomorphism algebra over $\F_{79}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-238 +10 \sqrt{53}})\). |
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_fa | $2$ | (not in LMFDB) |