Invariants
Base field: | $\F_{71}$ |
Dimension: | $1$ |
L-polynomial: | $1 + 7 x + 71 x^{2}$ |
Frobenius angles: | $\pm0.636349137885$ |
Angle rank: | $1$ (numerical) |
Number field: | \(\Q(\sqrt{-235}) \) |
Galois group: | $C_2$ |
Jacobians: | $2$ |
Isomorphism classes: | 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: | $1$ |
Slopes: | $[0, 1]$ |
Point counts
Point counts of the abelian variety
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $79$ | $5135$ | $356764$ | $25413115$ | $1804300829$ |
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $79$ | $5135$ | $356764$ | $25413115$ | $1804300829$ | $128099681840$ | $9095119298099$ | $645753580015635$ | $45848500438140724$ | $3255243549509378375$ |
Jacobians and polarizations
This isogeny class contains the Jacobians of 2 curves (of which all are hyperelliptic), and hence is principally polarizable:
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 \(\Q(\sqrt{-235}) \). |
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 |
---|---|---|
1.71.ah | $2$ | (not in LMFDB) |