Abelian variety isogeny class 2.67.an_ea over $\F_{67}$

• Label: 2.67.an_ea
• Base field: $\F_{67}$
• Dimension: $2$
• $p$-rank: $2$
• Ordinary: yes
• Supersingular: no
• Simple: no
• Geometrically simple: no
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: yes

Invariants

Base field:	$\F_{67}$
Dimension:	$2$
L-polynomial:	$( 1 - 15 x + 67 x^{2} )( 1 + 2 x + 67 x^{2} )$
	$1 - 13 x + 104 x^{2} - 871 x^{3} + 4489 x^{4}$
Frobenius angles:	$\pm0.131184157393$, $\pm0.538985133153$
Angle rank:	$2$ (numerical)
Jacobians:	$64$

This isogeny class is not 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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$3710$	$20323380$	$90232349480$	$405922120480800$	$1822941521272950050$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$55$	$4529$	$300010$	$20143897$	$1350201925$	$90459300386$	$6060712644895$	$406067694917233$	$27206534968801870$	$1822837806972444689$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 64 curves (of which all are hyperelliptic):

• $y^2=29 x^6+63 x^5+58 x^4+17 x^3+45 x^2+31 x+12$
• $y^2=30 x^6+18 x^5+46 x^4+20 x^3+28 x^2+7 x+44$
• $y^2=34 x^6+38 x^5+62 x^4+29 x^3+44 x^2+56 x+21$
• $y^2=11 x^6+x^5+48 x^4+18 x^3+60 x^2+5 x+9$
• $y^2=25 x^6+34 x^5+3 x^4+53 x^3+36 x^2+18 x+57$
• $y^2=17 x^6+57 x^5+27 x^4+4 x^3+18 x^2+57 x+63$
• $y^2=13 x^6+22 x^5+30 x^4+46 x^2+62 x+5$
• $y^2=57 x^6+63 x^5+48 x^4+16 x^3+54 x^2+56 x+13$
• $y^2=47 x^6+59 x^5+37 x^4+61 x^3+66 x^2+53 x+2$
• $y^2=52 x^6+58 x^5+65 x^4+53 x^3+2 x^2+50 x+43$
• $y^2=66 x^6+25 x^5+66 x^4+24 x^3+27 x^2+42 x+58$
• $y^2=45 x^6+35 x^5+42 x^4+56 x^3+39 x^2+5 x+19$
• $y^2=31 x^6+10 x^5+51 x^4+42 x^3+36 x^2+5 x+43$
• $y^2=21 x^6+39 x^5+29 x^4+17 x^3+44 x^2+36 x+62$
• $y^2=12 x^6+21 x^5+8 x^4+5 x^3+47 x^2+48 x+12$
• $y^2=48 x^6+17 x^5+25 x^4+66 x^3+2 x^2+38 x+27$
• $y^2=22 x^6+17 x^5+62 x^4+24 x^3+2 x^2+12 x+63$
• $y^2=24 x^6+13 x^5+31 x^4+22 x^3+26 x^2+13 x+45$
• $y^2=26 x^6+25 x^5+6 x^4+23 x^3+55 x^2+38 x+54$
• $y^2=51 x^6+29 x^5+63 x^4+41 x^3+13 x^2+55 x+30$
• and

• $y^2=48 x^5+7 x^4+21 x^3+7 x^2+48 x+54$
• $y^2=12 x^6+26 x^5+23 x^4+63 x^3+45 x^2+20 x+4$
• $y^2=45 x^6+5 x^5+60 x^4+22 x^3+39 x^2+32 x+30$
• $y^2=63 x^6+10 x^5+66 x^4+49 x^3+10 x^2+54 x+51$
• $y^2=2 x^6+30 x^5+8 x^4+45 x^3+3 x^2+x+53$
• $y^2=21 x^6+42 x^5+13 x^4+13 x^3+8 x^2+23 x+47$
• $y^2=66 x^6+28 x^5+33 x^4+45 x^3+46 x^2+3 x+50$
• $y^2=7 x^6+21 x^5+47 x^4+19 x^3+56 x^2+32 x+46$
• $y^2=15 x^6+26 x^5+11 x^4+48 x^3+33 x^2+58 x+3$
• $y^2=31 x^6+60 x^5+56 x^4+35 x^3+59 x^2+7 x+10$
• $y^2=58 x^6+4 x^5+13 x^4+22 x^3+14 x^2+20 x+39$
• $y^2=5 x^6+61 x^5+66 x^4+25 x^3+22 x^2+43 x$
• $y^2=47 x^6+21 x^5+20 x^4+46 x^3+52 x^2+40 x+50$
• $y^2=63 x^6+58 x^5+65 x^3+29 x^2+62 x+3$
• $y^2=28 x^6+62 x^5+37 x^4+38 x^3+60 x^2+3 x+7$
• $y^2=60 x^6+x^5+17 x^4+37 x^3+59 x^2+26 x+43$
• $y^2=19 x^6+11 x^5+66 x^4+58 x^3+25 x^2+60 x+49$
• $y^2=18 x^6+32 x^5+16 x^4+60 x^3+58 x^2+11 x+3$
• $y^2=5 x^6+28 x^5+4 x^4+22 x^3+50 x^2+49 x+27$
• $y^2=27 x^6+22 x^5+28 x^4+49 x^3+4 x^2+35 x+58$
• $y^2=54 x^6+x^5+16 x^4+64 x^3+15 x^2+33 x+37$
• $y^2=12 x^6+38 x^5+19 x^4+56 x^3+29 x^2+57 x+20$
• $y^2=17 x^6+31 x^5+15 x^4+16 x^3+7 x^2+26 x+52$
• $y^2=27 x^6+4 x^5+12 x^4+51 x^3+25 x^2+34 x+35$
• $y^2=38 x^6+58 x^5+56 x^4+10 x^3+x^2+45 x+1$
• $y^2=x^6+31 x^5+37 x^4+9 x^3+4 x^2+54 x+1$
• $y^2=13 x^6+33 x^5+21 x^4+29 x^3+23 x^2+51 x+9$
• $y^2=8 x^6+56 x^4+x^2+25 x+25$
• $y^2=48 x^6+46 x^5+52 x^4+47 x^3+25 x^2+53 x+36$
• $y^2=24 x^6+65 x^5+53 x^4+61 x^3+3 x^2+14 x+31$
• $y^2=53 x^6+22 x^5+20 x^4+9 x^3+55 x^2+30 x+41$
• $y^2=9 x^6+47 x^5+60 x^4+5 x^3+49 x^2+50 x+53$
• $y^2=33 x^6+55 x^5+28 x^4+18 x^3+45 x^2+39 x+6$
• $y^2=50 x^6+14 x^5+56 x^4+22 x^3+63 x^2+13 x+46$
• $y^2=x^6+33 x^5+22 x^4+15 x^3+5 x^2+35 x+34$
• $y^2=2 x^6+38 x^5+12 x^4+14 x^3+8 x^2+43 x+2$
• $y^2=42 x^6+x^5+28 x^4+20 x^3+22 x^2+3 x+44$
• $y^2=38 x^6+2 x^5+56 x^4+14 x^3+58 x^2+4 x+53$
• $y^2=40 x^6+x^5+26 x^4+44 x^3+64 x^2+22 x+48$
• $y^2=21 x^6+55 x^5+63 x^4+41 x^3+23 x^2+36 x+17$
• $y^2=8 x^6+12 x^5+50 x^4+20 x^3+53 x^2+37 x+1$
• $y^2=25 x^6+25 x^5+14 x^4+47 x^3+x^2+37 x+38$
• $y^2=48 x^6+8 x^5+64 x^4+48 x^3+6 x^2+39 x+27$
• $y^2=43 x^6+42 x^5+34 x^4+40 x^3+49 x^2+26 x+54$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{67}$.

Endomorphism algebra over $\F_{67}$

The isogeny class factors as 1.67.ap $\times$ 1.67.c and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

• 1.67.ap : \(\Q(\sqrt{-43}) \).
• 1.67.c : \(\Q(\sqrt{-66}) \).

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
2.67.ar_gi	$2$	(not in LMFDB)
2.67.n_ea	$2$	(not in LMFDB)
2.67.r_gi	$2$	(not in LMFDB)