Abelian variety isogeny class 2.17.i_bm over $\F_{17}$

• Label: 2.17.i_bm
• Base field: $\F_{17}$
• Dimension: $2$
• $p$-rank: $2$
• Ordinary: yes
• Supersingular: no
• Simple: yes
• Geometrically simple: yes
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: yes

Invariants

Base field:	$\F_{17}$
Dimension:	$2$
L-polynomial:	$1 + 8 x + 38 x^{2} + 136 x^{3} + 289 x^{4}$
Frobenius angles:	$\pm0.520700664612$, $\pm0.860245578628$
Angle rank:	$2$ (numerical)
Number field:	4.0.29952.1
Galois group:	$D_{4}$
Jacobians:	$14$

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:	$2$
Slopes:	$[0, 0, 1, 1]$

Point counts

Point counts of the abelian variety

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$472$	$86848$	$24185752$	$6938113024$	$2015098329112$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$26$	$302$	$4922$	$83070$	$1419226$	$24155246$	$410280442$	$6975768190$	$118587782042$	$2015997058862$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 14 curves (of which all are hyperelliptic):

• $y^2=x^6+4 x^5+x^4+4 x^3+7 x^2+14 x+2$
• $y^2=15 x^5+13 x^4+13 x^3+12 x^2+16 x+1$
• $y^2=7 x^5+14 x^4+11 x^3+3 x^2+8$
• $y^2=2 x^6+14 x^5+3 x^4+9 x^3+10 x^2+14 x$
• $y^2=14 x^6+8 x^5+2 x^4+9 x^3+12 x^2+x+8$
• $y^2=2 x^5+15 x^4+14 x^3+5 x^2+12 x+16$
• $y^2=2 x^6+5 x^5+x^4+14 x^2+4 x+4$
• $y^2=12 x^6+7 x^5+9 x^4+3 x^3+14 x^2+13 x+1$
• $y^2=15 x^6+7 x^4+x^3+16 x^2+11 x+9$
• $y^2=9 x^6+2 x^5+4 x^4+7 x^3+12 x^2+11 x+2$
• $y^2=15 x^6+x^5+10 x^4+12 x^3+6 x^2+11 x+2$
• $y^2=15 x^6+9 x^5+13 x^4+9 x^3+13 x^2+12 x+16$
• $y^2=16 x^6+13 x^5+x^4+15 x^3+5 x^2+6 x+8$
• $y^2=x^6+14 x^5+9 x^4+12 x^3+15 x^2+x$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{17}$.

Endomorphism algebra over $\F_{17}$

The endomorphism algebra of this simple isogeny class is 4.0.29952.1.

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
2.17.ai_bm	$2$	(not in LMFDB)