Abelian variety isogeny class 1.241.ax over $\F_{241}$

• Label: 1.241.ax
• Base field: $\F_{241}$
• Dimension: $1$
• $p$-rank: $1$
• Ordinary: yes
• Supersingular: no
• Simple: yes
• Geometrically simple: yes
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: yes

Invariants

Base field:	$\F_{241}$
Dimension:	$1$
L-polynomial:	$1 - 23 x + 241 x^{2}$
Frobenius angles:	$\pm0.234456042679$
Angle rank:	$1$ (numerical)
Number field:	\(\Q(\sqrt{-435}) \)
Galois group:	$C_2$
Jacobians:	$4$

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$219$	$58035$	$14001984$	$3373516515$	$812991562779$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$219$	$58035$	$14001984$	$3373516515$	$812991562779$	$195930602231040$	$47219273002535979$	$11379844832322877635$	$2742542605994752574784$	$660952768067719447645875$

Jacobians and polarizations

This isogeny class contains the Jacobians of 4 curves (of which all are hyperelliptic), and hence is principally polarizable:

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{241}$.

Endomorphism algebra over $\F_{241}$

The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-435}) \).

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
1.241.x	$2$	(not in LMFDB)