Properties

Label 2.79.abd_oe
Base field $\F_{79}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple no
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian no

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Invariants

Base field:  $\F_{79}$
Dimension:  $2$
L-polynomial:  $( 1 - 15 x + 79 x^{2} )( 1 - 14 x + 79 x^{2} )$
  $1 - 29 x + 368 x^{2} - 2291 x^{3} + 6241 x^{4}$
Frobenius angles:  $\pm0.180303926787$, $\pm0.211343260462$
Angle rank:  $2$ (numerical)
Jacobians:  $0$
Isomorphism classes:  8

This isogeny class is not simple, primitive, ordinary, and not supersingular. It is principally polarizable.

Newton polygon

This isogeny class is ordinary.

$p$-rank:  $2$
Slopes:  $[0, 0, 1, 1]$

Point counts

Point counts of the abelian variety

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $4290$ $38309700$ $243460297080$ $1517850235044000$ $9468937239734350950$

Point counts of the (virtual) curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $51$ $6137$ $493794$ $38969113$ $3077271261$ $243089065802$ $19203915509739$ $1517108779981393$ $119851595062315326$ $9468276071846284577$

Jacobians and polarizations

This isogeny class is principally polarizable, but does not contain a Jacobian.

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{79}$.

Endomorphism algebra over $\F_{79}$
The isogeny class factors as 1.79.ap $\times$ 1.79.ao 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.

TwistExtension degreeCommon base change
2.79.ab_aca$2$(not in LMFDB)
2.79.b_aca$2$(not in LMFDB)
2.79.bd_oe$2$(not in LMFDB)