Abelian variety isogeny class 1.157.l over $\F_{157}$

• Label: 1.157.l
• Base field: $\F_{157}$
• 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:	$\F_{157}$
Dimension:	$1$
L-polynomial:	$1 + 11 x + 157 x^{2}$
Frobenius angles:	$\pm0.644648694625$
Angle rank:	$1$ (numerical)
Number field:	\(\Q(\sqrt{-3}) \)
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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$169$	$24843$	$3866044$	$607585251$	$95389464469$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$169$	$24843$	$3866044$	$607585251$	$95389464469$	$14976064748736$	$2351243281357321$	$369145195643354403$	$57955795535652304108$	$9099059901007479391443$

Jacobians and polarizations

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

• $y^2=x^3+15$
• $y^2=x^3+6 x+6$
• $y^2=x^3+74 x+148$
• $y^2=x^3+153 x+153$
• $y^2=x^3+80 x+80$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{157}$.

Endomorphism algebra over $\F_{157}$

The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-3}) \).

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

Twist	Extension degree	Common base change
1.157.al	$2$	(not in LMFDB)
1.157.az	$3$	(not in LMFDB)
1.157.o	$3$	(not in LMFDB)