Properties

Label 1.317.at
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:  $1 - 19 x + 317 x^{2}$
Frobenius angles:  $\pm0.320848898950$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(\sqrt{-907}) \)
Galois group:  $C_2$
Jacobians:  3

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 3 curves, and hence is principally polarizable:

Point counts of the abelian variety

$r$ 1 2 3 4 5 6 7 8 9 10
$A(\F_{q^r})$ 299 100763 31866224 10098165571 3201077250319 1014741791276096 321673166661715531 101970394093453181283 32324614926628535961008 10246902931639364045464643

Point counts of the curve

$r$ 1 2 3 4 5 6 7 8 9 10
$C(\F_{q^r})$ 299 100763 31866224 10098165571 3201077250319 1014741791276096 321673166661715531 101970394093453181283 32324614926628535961008 10246902931639364045464643

Decomposition and endomorphism algebra

Endomorphism algebra over $\F_{317}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-907}) \).
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.t$2$(not in LMFDB)