Abelian variety isogeny class 1.149.af over $\F_{149}$

• Label: 1.149.af
• Base field: $\F_{149}$
• 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:	$\F_{149}$
Dimension:	$1$
L-polynomial:	$1 - 5 x + 149 x^{2}$
Frobenius angles:	$\pm0.434343007656$
Angle rank:	$1$ (numerical)
Number field:	\(\Q(\sqrt{-571}) \)
Galois group:	$C_2$
Jacobians:	$5$
Isomorphism classes:	5

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$145$	$22475$	$3310060$	$492854275$	$73439310725$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$145$	$22475$	$3310060$	$492854275$	$73439310725$	$10942528750400$	$1630436541511265$	$242935032827261475$	$36197319868074805180$	$5393400661994039811875$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 5 curves (of which 0 are hyperelliptic):

• $y^2=x^3+86 x+23$
• $y^2=x^3+85 x+21$
• $y^2=x^3+60 x+60$
• $y^2=x^3+88 x+88$
• $y^2=x^3+115 x+81$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{149}$.

Endomorphism algebra over $\F_{149}$

The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-571}) \).

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
1.149.f	$2$	(not in LMFDB)