Invariants
Base field: | $\F_{71}$ |
Dimension: | $2$ |
L-polynomial: | $1 - 5 x + 110 x^{2} - 355 x^{3} + 5041 x^{4}$ |
Frobenius angles: | $\pm0.327665769382$, $\pm0.570163421692$ |
Angle rank: | $2$ (numerical) |
Number field: | 4.0.4075189.1 |
Galois group: | $D_{4}$ |
Jacobians: | $252$ |
Isomorphism classes: | 252 |
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
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $4792$ | $26413504$ | $128264761312$ | $645734207562496$ | $3255315766187308552$ |
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $67$ | $5237$ | $358372$ | $25410921$ | $1804269377$ | $128099748062$ | $9095110487327$ | $645753559880113$ | $45848501533441612$ | $3255243551203107677$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 252 curves (of which all are hyperelliptic):
- $y^2=62 x^6+23 x^5+15 x^4+29 x^3+46 x+21$
- $y^2=29 x^6+53 x^5+67 x^4+69 x^3+26 x^2+11 x+8$
- $y^2=62 x^6+15 x^5+23 x^4+48 x^3+9 x^2+68 x+22$
- $y^2=48 x^6+70 x^5+5 x^4+47 x^3+35 x^2+9 x+48$
- $y^2=36 x^6+50 x^5+51 x^4+57 x^3+47 x^2+18 x+47$
- $y^2=30 x^6+64 x^5+62 x^3+60 x^2+62 x+40$
- $y^2=70 x^6+58 x^5+31 x^4+70 x^3+12 x^2+24 x+50$
- $y^2=13 x^6+56 x^5+42 x^4+13 x^3+21 x^2+66 x+64$
- $y^2=47 x^6+7 x^5+12 x^4+49 x^3+23 x^2+30 x+11$
- $y^2=40 x^6+13 x^5+47 x^4+55 x^3+42 x^2+65 x+44$
- $y^2=12 x^6+60 x^5+5 x^4+59 x^3+12 x^2+15 x+7$
- $y^2=46 x^6+63 x^5+22 x^4+66 x^3+59 x^2+61 x+10$
- $y^2=50 x^6+63 x^5+36 x^4+29 x^3+55 x^2+5 x+46$
- $y^2=55 x^6+25 x^5+66 x^4+66 x^3+11 x^2+22 x+2$
- $y^2=10 x^6+45 x^5+64 x^4+13 x^3+9 x^2+26 x+62$
- $y^2=58 x^6+4 x^5+55 x^3+11 x^2+61 x+50$
- $y^2=9 x^6+41 x^5+43 x^4+17 x^3+13 x^2+49 x+4$
- $y^2=23 x^5+20 x^4+26 x^3+66 x^2+70 x+8$
- $y^2=13 x^6+63 x^5+62 x^4+12 x^3+32 x^2+41 x+61$
- $y^2=33 x^6+20 x^5+7 x^4+10 x^3+64 x^2+21 x+29$
- and 232 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 4.0.4075189.1. |
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.f_eg | $2$ | (not in LMFDB) |