Abelian variety isogeny class 2.97.s_ko over $\F_{97}$

• Label: 2.97.s_ko
• Base field: $\F_{97}$
• 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:	$\F_{97}$
Dimension:	$2$
L-polynomial:	$( 1 + 8 x + 97 x^{2} )( 1 + 10 x + 97 x^{2} )$
	$1 + 18 x + 274 x^{2} + 1746 x^{3} + 9409 x^{4}$
Frobenius angles:	$\pm0.633124938748$, $\pm0.669494215923$
Angle rank:	$2$ (numerical)
Jacobians:	$102$
Cyclic group of points:	no
Non-cyclic primes:	$2, 3$

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$11448$	$90668160$	$829576675512$	$7838487289036800$	$73744527421645804728$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$116$	$9634$	$908948$	$88541182$	$8587586516$	$832968709666$	$80798290598708$	$7837433845175038$	$760231055899646516$	$73742412690681271714$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 102 curves (of which all are hyperelliptic):

• $y^2=77 x^6+17 x^5+43 x^4+34 x^3+43 x^2+17 x+77$
• $y^2=63 x^6+33 x^5+83 x^4+89 x^3+56 x^2+43 x+42$
• $y^2=87 x^6+64 x^5+49 x^4+92 x^3+44 x^2+43 x+15$
• $y^2=55 x^6+87 x^5+31 x^4+20 x^3+88 x^2+90 x+78$
• $y^2=46 x^6+95 x^5+70 x^4+27 x^3+94 x^2+85 x+63$
• $y^2=x^6+37 x^5+55 x^4+93 x^3+55 x^2+37 x+1$
• $y^2=40 x^6+24 x^5+2 x^4+39 x^3+47 x^2+62 x+68$
• $y^2=68 x^6+71 x^5+83 x^4+29 x^3+83 x^2+71 x+68$
• $y^2=34 x^6+89 x^5+92 x^4+25 x^3+92 x^2+89 x+34$
• $y^2=62 x^6+94 x^5+74 x^4+72 x^3+23 x^2+94 x+35$
• $y^2=17 x^6+75 x^5+71 x^4+9 x^3+71 x^2+75 x+17$
• $y^2=95 x^6+60 x^5+31 x^4+48 x^3+31 x^2+60 x+95$
• $y^2=52 x^6+64 x^5+24 x^4+94 x^3+24 x^2+64 x+52$
• $y^2=72 x^6+66 x^5+83 x^4+20 x^3+28 x^2+70 x+6$
• $y^2=22 x^6+5 x^5+58 x^4+3 x^3+58 x^2+5 x+22$
• $y^2=62 x^6+20 x^5+31 x^4+86 x^3+79 x^2+56 x+35$
• $y^2=93 x^6+70 x^5+38 x^4+27 x^3+38 x^2+70 x+93$
• $y^2=21 x^6+8 x^5+39 x^4+3 x^3+39 x^2+8 x+21$
• $y^2=7 x^6+85 x^5+86 x^4+84 x^3+49 x^2+12 x+40$
• $y^2=75 x^6+43 x^5+7 x^4+39 x^3+7 x^2+43 x+75$
• and

• $y^2=6 x^6+82 x^5+66 x^4+18 x^2+55 x+91$
• $y^2=58 x^6+70 x^5+12 x^4+36 x^3+24 x^2+86 x+76$
• $y^2=84 x^6+44 x^5+53 x^4+36 x^3+64 x^2+49 x+90$
• $y^2=92 x^6+32 x^5+76 x^4+43 x^3+76 x^2+32 x+92$
• $y^2=87 x^6+51 x^5+92 x^4+18 x^3+92 x^2+51 x+87$
• $y^2=39 x^6+88 x^5+38 x^4+48 x^3+38 x^2+88 x+39$
• $y^2=66 x^6+75 x^5+96 x^4+90 x^3+24 x^2+35 x+95$
• $y^2=10 x^6+28 x^5+16 x^4+57 x^3+16 x^2+28 x+10$
• $y^2=91 x^6+15 x^5+65 x^4+26 x^3+65 x^2+15 x+91$
• $y^2=95 x^6+83 x^5+44 x^4+54 x^3+x^2+52 x+43$
• $y^2=21 x^6+86 x^5+36 x^4+84 x^3+89 x^2+27 x+82$
• $y^2=63 x^6+94 x^5+93 x^4+36 x^3+93 x^2+94 x+63$
• $y^2=27 x^6+37 x^5+69 x^4+43 x^3+69 x^2+37 x+27$
• $y^2=39 x^6+73 x^5+49 x^4+57 x^3+79 x^2+33 x+39$
• $y^2=92 x^6+79 x^5+39 x^4+51 x^3+87 x^2+8 x+29$
• $y^2=56 x^6+4 x^5+11 x^4+81 x^3+11 x^2+4 x+56$
• $y^2=21 x^6+51 x^5+2 x^4+66 x^3+75 x^2+60 x+82$
• $y^2=15 x^6+66 x^5+74 x^4+53 x^3+74 x^2+66 x+15$
• $y^2=58 x^6+77 x^5+88 x^4+73 x^3+89 x^2+80 x+74$
• $y^2=24 x^6+67 x^5+25 x^4+13 x^3+25 x^2+67 x+24$
• $y^2=55 x^6+75 x^5+5 x^4+57 x^3+37 x^2+33 x+20$
• $y^2=10 x^6+82 x^5+27 x^4+41 x^3+27 x^2+82 x+10$
• $y^2=9 x^6+87 x^5+31 x^4+55 x^3+18 x^2+69 x+9$
• $y^2=70 x^6+61 x^5+61 x^4+29 x^3+79 x^2+88 x+33$
• $y^2=8 x^6+11 x^5+75 x^4+29 x^3+75 x^2+11 x+8$
• $y^2=33 x^6+25 x^5+87 x^4+79 x^3+46 x^2+44 x+96$
• $y^2=48 x^6+44 x^5+24 x^4+44 x^3+24 x^2+44 x+48$
• $y^2=61 x^6+46 x^5+48 x^4+24 x^3+33 x^2+71 x+53$
• $y^2=62 x^6+45 x^4+18 x^3+45 x^2+62$
• $y^2=75 x^6+48 x^5+44 x^4+21 x^3+85 x^2+18 x+75$
• $y^2=63 x^6+95 x^5+52 x^4+51 x^3+76 x^2+25 x+69$
• $y^2=17 x^6+67 x^5+94 x^4+52 x^3+88 x^2+21 x+71$
• $y^2=85 x^6+43 x^5+3 x^4+24 x^3+3 x^2+43 x+85$
• $y^2=76 x^6+65 x^5+67 x^4+24 x^3+67 x^2+65 x+76$
• $y^2=74 x^6+14 x^5+36 x^4+11 x^3+36 x^2+14 x+74$
• $y^2=64 x^6+47 x^5+5 x^4+46 x^3+5 x^2+47 x+64$
• $y^2=62 x^6+57 x^5+67 x^4+74 x^3+67 x^2+57 x+62$
• $y^2=80 x^6+26 x^5+x^4+34 x^3+x^2+26 x+80$
• $y^2=85 x^6+46 x^5+77 x^4+11 x^3+77 x^2+46 x+85$
• $y^2=95 x^6+65 x^5+30 x^4+21 x^3+30 x^2+65 x+95$
• $y^2=62 x^6+24 x^5+25 x^4+30 x^3+25 x^2+24 x+62$
• $y^2=74 x^6+50 x^5+29 x^4+80 x^3+51 x^2+16 x+87$
• $y^2=64 x^6+3 x^5+70 x^4+36 x^3+70 x^2+3 x+64$
• $y^2=14 x^6+72 x^5+8 x^4+55 x^3+70 x^2+32 x+76$
• $y^2=61 x^6+82 x^5+23 x^4+45 x^3+23 x^2+82 x+61$
• $y^2=94 x^6+30 x^5+50 x^4+24 x^3+50 x^2+30 x+94$
• $y^2=95 x^6+35 x^5+71 x^4+31 x^3+58 x^2+6 x+66$
• $y^2=10 x^6+17 x^5+60 x^4+46 x^3+5 x^2+21 x+21$
• $y^2=25 x^6+5 x^5+33 x^4+45 x^3+75 x^2+13 x+86$
• $y^2=71 x^6+66 x^5+96 x^4+27 x^3+70 x^2+2 x+14$
• $y^2=51 x^6+69 x^5+11 x^4+50 x^3+11 x^2+69 x+51$
• $y^2=49 x^6+88 x^5+46 x^4+34 x^3+46 x^2+88 x+49$
• $y^2=73 x^6+11 x^5+77 x^4+33 x^3+29 x^2+3 x+43$
• $y^2=77 x^6+12 x^5+32 x^4+85 x^3+96 x^2+11 x+42$
• $y^2=49 x^6+57 x^5+59 x^4+75 x^3+59 x^2+57 x+49$
• $y^2=93 x^6+90 x^5+49 x^4+25 x^3+2 x^2+82 x+35$
• $y^2=86 x^6+39 x^5+20 x^4+36 x^3+57 x^2+59 x+88$
• $y^2=93 x^6+23 x^5+21 x^4+28 x^3+21 x^2+23 x+93$
• $y^2=70 x^6+71 x^5+44 x^4+3 x^3+2 x^2+26 x+85$
• $y^2=27 x^6+31 x^5+95 x^4+95 x^2+31 x+27$
• $y^2=x^6+79 x^5+56 x^4+45 x^3+60 x^2+12 x+27$
• $y^2=69 x^6+37 x^5+5 x^4+x^3+5 x^2+37 x+69$
• $y^2=28 x^6+59 x^5+24 x^4+61 x^3+11 x^2+55 x+78$
• $y^2=40 x^6+59 x^5+84 x^4+32 x^3+84 x^2+59 x+40$
• $y^2=32 x^6+81 x^5+43 x^4+60 x^3+88 x^2+75 x+72$
• $y^2=67 x^6+52 x^5+54 x^4+39 x^3+35 x^2+76 x+52$
• $y^2=42 x^6+11 x^5+68 x^3+11 x+42$
• $y^2=x^6+86 x^4+9 x^3+86 x^2+1$
• $y^2=74 x^6+27 x^5+41 x^4+64 x^3+34 x^2+66 x+58$
• $y^2=76 x^6+89 x^5+4 x^4+13 x^3+4 x^2+89 x+76$
• $y^2=2 x^6+67 x^5+94 x^4+36 x^3+94 x^2+67 x+2$
• $y^2=10 x^6+40 x^5+35 x^3+40 x+10$
• $y^2=89 x^6+18 x^5+44 x^4+78 x^3+44 x^2+18 x+89$
• $y^2=48 x^6+29 x^5+76 x^4+88 x^3+74 x^2+68 x+86$
• $y^2=3 x^6+35 x^5+81 x^4+22 x^3+81 x^2+35 x+3$
• $y^2=22 x^6+43 x^5+92 x^4+21 x^3+45 x^2+88 x+64$
• $y^2=69 x^6+63 x^5+10 x^4+86 x^3+55 x^2+87 x+46$
• $y^2=83 x^6+35 x^5+x^4+52 x^3+x^2+35 x+83$
• $y^2=23 x^6+37 x^5+53 x^4+71 x^3+93 x^2+46 x+71$
• $y^2=76 x^6+9 x^5+59 x^4+78 x^3+59 x^2+9 x+76$
• $y^2=13 x^6+8 x^5+67 x^4+67 x^3+74 x^2+31 x+56$
• $y^2=66 x^6+40 x^5+3 x^4+28 x^3+91 x^2+63 x+54$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{97}$.

Endomorphism algebra over $\F_{97}$

The isogeny class factors as 1.97.i $\times$ 1.97.k and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

• 1.97.i : \(\Q(\sqrt{-1}) \).
• 1.97.k : \(\Q(\sqrt{-2}) \).

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
2.97.as_ko	$2$	(not in LMFDB)
2.97.ac_ek	$2$	(not in LMFDB)
2.97.c_ek	$2$	(not in LMFDB)