Invariants
Base field: | $\F_{263}$ |
Dimension: | $1$ |
L-polynomial: | $1 - 6 x + 263 x^{2}$ |
Frobenius angles: | $\pm0.440775397845$ |
Angle rank: | $1$ (numerical) |
Number field: | \(\Q(\sqrt{-254}) \) |
Galois group: | $C_2$ |
Jacobians: | $16$ |
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
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $258$ | $69660$ | $18195966$ | $4784248800$ | $1258282398738$ |
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $258$ | $69660$ | $18195966$ | $4784248800$ | $1258282398738$ | $330928759924380$ | $87034260228761166$ | $22890010289754211200$ | $6020072706257942878818$ | $1583279121785712312606300$ |
Jacobians and polarizations
This isogeny class contains the Jacobians of 16 curves (of which all are hyperelliptic), and hence is principally polarizable:
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{263}$.
Endomorphism algebra over $\F_{263}$The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-254}) \). |
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 |
---|---|---|
1.263.g | $2$ | (not in LMFDB) |