Abelian variety isogeny class 2.61.s_gg over $\F_{61}$

• Label: 2.61.s_gg
• Base field: $\F_{61}$
• Dimension: $2$
• $p$-rank: $2$
• Ordinary: yes
• Supersingular: no
• Simple: yes
• Geometrically simple: no
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: yes

Invariants

Base field:	$\F_{61}$
Dimension:	$2$
L-polynomial:	$1 + 18 x + 162 x^{2} + 1098 x^{3} + 3721 x^{4}$
Frobenius angles:	$\pm0.553165206808$, $\pm0.946834793192$
Angle rank:	$1$ (numerical)
Number field:	\(\Q(i, \sqrt{41})\)
Galois group:	$C_2^2$
Jacobians:	$72$
Isomorphism classes:	124
Cyclic group of points:	no
Non-cyclic primes:	$2, 5$

This isogeny class is simple but not 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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$5000$	$13840000$	$51606245000$	$191545600000000$	$713412254700125000$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$80$	$3722$	$227360$	$13834158$	$844678400$	$51520374362$	$3142740958640$	$191707300122718$	$11694146323225520$	$713342911662882602$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 72 curves (of which all are hyperelliptic):

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

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

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{61^{4}}$.

Endomorphism algebra over $\F_{61}$

The endomorphism algebra of this simple isogeny class is \(\Q(i, \sqrt{41})\).

Endomorphism algebra over $\overline{\F}_{61}$

The base change of $A$ to $\F_{61^{4}}$ is 1.13845841.aiqs^2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-41}) \)$)$

Remainder of endomorphism lattice by field

• Endomorphism algebra over $\F_{61^{2}}$

  The base change of $A$ to $\F_{61^{2}}$ is the simple isogeny class 2.3721.a_aiqs and its endomorphism algebra is \(\Q(i, \sqrt{41})\).

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
2.61.as_gg	$2$	(not in LMFDB)
2.61.a_abo	$8$	(not in LMFDB)
2.61.a_bo	$8$	(not in LMFDB)