Invariants
| Base field: | $\F_{71}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 4 x - 2 x^{2} + 284 x^{3} + 5041 x^{4}$ |
| Frobenius angles: | $\pm0.293886914714$, $\pm0.817779342299$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-33 +2 \sqrt{37}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $414$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5328$ | $25318656$ | $128437242192$ | $646140608188416$ | $3255110914228173648$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $76$ | $5022$ | $358852$ | $25426910$ | $1804155836$ | $128100442302$ | $9095110314548$ | $645753515052094$ | $45848501089150252$ | $3255243551491947102$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 414 curves (of which all are hyperelliptic):
- $y^2=46 x^6+69 x^5+67 x^4+41 x^3+25 x^2+34 x+31$
- $y^2=44 x^6+15 x^5+49 x^4+22 x^3+11 x^2+52 x+64$
- $y^2=26 x^6+40 x^5+18 x^4+31 x^3+54 x^2+66 x+40$
- $y^2=8 x^6+4 x^5+39 x^4+x^3+4 x^2+70 x+16$
- $y^2=57 x^6+16 x^5+25 x^4+24 x^3+53 x^2+70 x+43$
- $y^2=66 x^6+70 x^5+23 x^4+38 x^3+56 x^2+47 x+49$
- $y^2=26 x^6+19 x^5+41 x^4+65 x^3+54 x^2+10 x+62$
- $y^2=56 x^6+20 x^5+18 x^4+31 x^3+11 x^2+51 x+43$
- $y^2=21 x^6+32 x^5+4 x^4+50 x^3+47 x^2+67 x$
- $y^2=34 x^6+28 x^5+27 x^4+65 x^3+50 x^2+40 x+44$
- $y^2=7 x^6+x^5+29 x^4+61 x^3+33 x^2+52 x+39$
- $y^2=13 x^6+19 x^5+67 x^4+3 x^3+21 x^2+49 x+64$
- $y^2=36 x^6+17 x^5+60 x^4+17 x^3+49 x^2+37 x+66$
- $y^2=38 x^6+57 x^5+40 x^4+60 x^3+62 x^2+47 x+18$
- $y^2=25 x^6+56 x^5+47 x^4+42 x^3+33 x^2+12 x+43$
- $y^2=6 x^6+28 x^5+65 x^4+10 x^3+15 x^2+9 x+1$
- $y^2=37 x^6+62 x^5+25 x^4+30 x^3+28 x^2+36 x+27$
- $y^2=55 x^6+51 x^5+5 x^4+25 x^3+16 x^2+54 x+20$
- $y^2=67 x^6+61 x^5+10 x^4+39 x^3+34 x^2+68 x+10$
- $y^2=44 x^6+48 x^5+44 x^4+15 x^3+10 x^2+46 x+52$
- and 394 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{71}$.
Endomorphism algebra over $\F_{71}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-33 +2 \sqrt{37}})\). |
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 |
|---|---|---|
| 2.71.ae_ac | $2$ | (not in LMFDB) |