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

• Label: 2.61.e_ew
• Base field: $\F_{61}$
• 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:	$\F_{61}$
Dimension:	$2$
L-polynomial:	$( 1 + 2 x + 61 x^{2} )^{2}$
	$1 + 4 x + 126 x^{2} + 244 x^{3} + 3721 x^{4}$
Frobenius angles:	$\pm0.540867587811$, $\pm0.540867587811$
Angle rank:	$1$ (numerical)
Jacobians:	$92$
Cyclic group of points:	no
Non-cyclic primes:	$2$

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$4096$	$14745600$	$51358437376$	$191527885209600$	$713401701844258816$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$66$	$3958$	$226266$	$13832878$	$844665906$	$51521025958$	$3142737286986$	$191707284347998$	$11694146488623906$	$713342912618909398$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 92 curves (of which all are hyperelliptic):

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

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

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{61}$

The isogeny class factors as 1.61.c^2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-15}) \)$)$

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
2.61.ae_ew	$2$	(not in LMFDB)
2.61.a_eo	$2$	(not in LMFDB)
2.61.ac_acf	$3$	(not in LMFDB)