Properties

Label 1.317.b
Base Field $\F_{317}$
Dimension $1$
Ordinary Yes
$p$-rank $1$
Principally polarizable Yes
Contains a Jacobian Yes

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Invariants

Base field:  $\F_{317}$
Dimension:  $1$
L-polynomial:  $1 + x + 317 x^{2}$
Frobenius angles:  $\pm0.508940207545$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(\sqrt{-1267}) \)
Galois group:  $C_2$
Jacobians:  6

This isogeny class is simple and geometrically simple.

Newton polygon

This isogeny class is ordinary.

$p$-rank:  $1$
Slopes:  $[0, 1]$

Point counts

This isogeny class contains the Jacobians of 6 curves, and hence is principally polarizable:

Point counts of the abelian variety

$r$ 1 2 3 4 5 6 7 8 9 10
$A(\F_{q^r})$ 319 101123 31854064 10097839411 3201078902219 1014741916037696 321673167252383111 101970394069558047363 32324614926381054899248 10246902931640438074502843

Point counts of the curve

$r$ 1 2 3 4 5 6 7 8 9 10
$C(\F_{q^r})$ 319 101123 31854064 10097839411 3201078902219 1014741916037696 321673167252383111 101970394069558047363 32324614926381054899248 10246902931640438074502843

Decomposition and endomorphism algebra

Endomorphism algebra over $\F_{317}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-1267}) \).
All geometric endomorphisms are defined over $\F_{317}$.

Base change

This is a primitive isogeny class.

Twists

Below is a list of all twists of this isogeny class.
TwistExtension DegreeCommon base change
1.317.ab$2$(not in LMFDB)