Properties

Label 2.47.e_bu
Base field $\F_{47}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple yes
Geometrically simple yes
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

Related objects

Downloads

Learn more

Invariants

Base field:  $\F_{47}$
Dimension:  $2$
L-polynomial:  $1 + 4 x + 46 x^{2} + 188 x^{3} + 2209 x^{4}$
Frobenius angles:  $\pm0.375903779864$, $\pm0.734473710534$
Angle rank:  $2$ (numerical)
Number field:  4.0.175253.1
Galois group:  $D_{4}$
Jacobians:  $276$
Cyclic group of points:    no
Non-cyclic primes:   $2$

This isogeny class is simple and 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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $2448$ $5052672$ $10787006736$ $23832200761344$ $52589097913728528$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $52$ $2286$ $103900$ $4883966$ $229301252$ $10779011118$ $506624976812$ $23811287392894$ $1119130519835092$ $52599132117379566$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 276 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{47}$.

Endomorphism algebra over $\F_{47}$
The endomorphism algebra of this simple isogeny class is 4.0.175253.1.

Base change

This is a primitive isogeny class.

Twists

Below is a list of all twists of this isogeny class.

TwistExtension degreeCommon base change
2.47.ae_bu$2$(not in LMFDB)