Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 + 6 x + 89 x^{2} )( 1 + 18 x + 89 x^{2} )$ |
| $1 + 24 x + 286 x^{2} + 2136 x^{3} + 7921 x^{4}$ | |
| Frobenius angles: | $\pm0.603010988689$, $\pm0.903075820349$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $274$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $10368$ | $62705664$ | $496727489664$ | $3935974331842560$ | $31182593869852011648$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $114$ | $7918$ | $704610$ | $62732446$ | $5584215954$ | $496981137166$ | $44231317602306$ | $3936589008026686$ | $350356402886396850$ | $31181719929964012078$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 274 curves (of which all are hyperelliptic):
- $y^2=9 x^6+2 x^5+57 x^4+26 x^3+24 x^2+88 x+25$
- $y^2=64 x^6+36 x^5+35 x^4+62 x^3+35 x^2+36 x+64$
- $y^2=34 x^6+85 x^5+83 x^4+47 x^3+23 x^2+19 x+84$
- $y^2=62 x^6+74 x^5+39 x^4+11 x^3+39 x^2+74 x+62$
- $y^2=88 x^5+85 x^4+42 x^3+47 x^2+61 x+29$
- $y^2=71 x^6+5 x^5+31 x^4+74 x^3+13 x^2+47 x+68$
- $y^2=75 x^6+14 x^5+29 x^4+26 x^3+29 x^2+14 x+75$
- $y^2=30 x^6+44 x^5+82 x^4+45 x^3+41 x^2+88 x+79$
- $y^2=32 x^6+81 x^5+39 x^4+55 x^3+54 x^2+70 x+1$
- $y^2=86 x^6+42 x^5+37 x^4+57 x^3+57 x^2+66$
- $y^2=31 x^6+68 x^5+37 x^4+75 x^3+76 x^2+71 x+13$
- $y^2=21 x^6+70 x^5+7 x^4+63 x^3+29 x^2+18 x+58$
- $y^2=17 x^6+59 x^5+59 x^4+4 x^3+59 x^2+56 x+45$
- $y^2=81 x^6+87 x^5+47 x^4+67 x^3+7 x^2+15 x+57$
- $y^2=71 x^6+11 x^5+31 x^4+44 x^3+15 x^2+40 x+11$
- $y^2=47 x^6+85 x^5+85 x^4+62 x^3+6 x^2+80 x+31$
- $y^2=87 x^6+39 x^5+31 x^4+39 x^3+82 x^2+57 x+53$
- $y^2=28 x^6+64 x^5+53 x^4+19 x^3+30 x^2+33 x+87$
- $y^2=46 x^6+2 x^5+79 x^4+54 x^3+76 x^2+84 x+78$
- $y^2=56 x^6+20 x^5+58 x^4+23 x^2+46 x+70$
- and 254 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{89}$.
Endomorphism algebra over $\F_{89}$| The isogeny class factors as 1.89.g $\times$ 1.89.s and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
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 |
|---|---|---|
| 2.89.ay_la | $2$ | (not in LMFDB) |
| 2.89.am_cs | $2$ | (not in LMFDB) |
| 2.89.m_cs | $2$ | (not in LMFDB) |