Abelian variety isogeny class 1.79.am over $\F_{79}$

• Label: 1.79.am
• Base field: $\F_{79}$
• 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:	$\F_{79}$
Dimension:	$1$
L-polynomial:	$1 - 12 x + 79 x^{2}$
Frobenius angles:	$\pm0.264120855861$
Angle rank:	$1$ (numerical)
Number field:	\(\Q(\sqrt{-43}) \)
Galois group:	$C_2$
Jacobians:	$4$
Isomorphism classes:	4
Cyclic group of points:	no
Non-cyclic primes:	$2$

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$68$	$6256$	$494156$	$38962368$	$3077115668$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$68$	$6256$	$494156$	$38962368$	$3077115668$	$243087196144$	$19203901191452$	$1517108736860928$	$119851595721852644$	$9468276085268264176$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 4 curves (of which 0 are hyperelliptic):

• $y^2=x^3+53 x+53$
• $y^2=x^3+46 x+46$
• $y^2=x^3+14 x+14$
• $y^2=x^3+51 x+74$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{79}$.

Endomorphism algebra over $\F_{79}$

The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-43}) \).

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
1.79.m	$2$	(not in LMFDB)