Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 + 6 x + 89 x^{2} )( 1 + 15 x + 89 x^{2} )$ |
| $1 + 21 x + 268 x^{2} + 1869 x^{3} + 7921 x^{4}$ | |
| Frobenius angles: | $\pm0.603010988689$, $\pm0.792528363707$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $280$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $10080$ | $63504000$ | $495562354560$ | $3937173065280000$ | $31181724726851714400$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $111$ | $8017$ | $702954$ | $62751553$ | $5584060311$ | $496981792942$ | $44231322689679$ | $3936588852132673$ | $350356405058590266$ | $31181719907986130977$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 280 curves (of which all are hyperelliptic):
- $y^2=4 x^6+47 x^5+44 x^4+78 x^3+42 x^2+7 x+15$
- $y^2=67 x^6+55 x^5+13 x^4+50 x^3+82 x^2+44 x+72$
- $y^2=24 x^6+71 x^5+72 x^4+5 x^3+41 x^2+63 x+38$
- $y^2=20 x^6+15 x^5+86 x^4+8 x^3+37 x^2+21 x+32$
- $y^2=80 x^6+86 x^5+15 x^4+87 x^3+86 x^2+72 x+62$
- $y^2=39 x^6+16 x^5+11 x^4+38 x^3+52 x^2+53 x+4$
- $y^2=20 x^6+59 x^5+39 x^4+11 x^3+22 x^2+19 x+34$
- $y^2=21 x^6+26 x^5+74 x^4+76 x^3+86 x^2+74 x$
- $y^2=19 x^6+73 x^5+15 x^4+23 x^3+31 x^2+33 x+29$
- $y^2=67 x^6+47 x^5+68 x^4+53 x^3+20 x^2+13 x+69$
- $y^2=40 x^6+79 x^5+37 x^4+7 x^3+13 x^2+11 x+16$
- $y^2=68 x^6+76 x^5+46 x^4+27 x^3+40 x^2+10 x+69$
- $y^2=46 x^6+26 x^5+25 x^4+7 x^3+75 x^2+21 x+50$
- $y^2=34 x^6+75 x^5+18 x^4+11 x^3+35 x^2+17 x+41$
- $y^2=88 x^6+52 x^5+16 x^4+15 x^3+20 x+40$
- $y^2=47 x^6+84 x^5+72 x^4+35 x^2+85 x+72$
- $y^2=9 x^6+85 x^5+14 x^4+71 x^3+49 x^2+26 x+4$
- $y^2=47 x^5+60 x^4+63 x^3+57 x^2+58 x+1$
- $y^2=70 x^6+32 x^5+74 x^4+67 x^3+43 x^2+59 x+32$
- $y^2=20 x^6+34 x^5+4 x^4+78 x^3+47 x^2+51 x+47$
- and 260 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.p 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.av_ki | $2$ | (not in LMFDB) |
| 2.89.aj_dk | $2$ | (not in LMFDB) |
| 2.89.j_dk | $2$ | (not in LMFDB) |