The Probability of Primality of the Order of a Genus 2 Curve Jacobian

Speaker  Wouter Castryck

Host  Kristin Lauter

Affiliation  K.U.Leuven

Duration  00:57:17

Date recorded  19 October 2010

In 2000, Galbraith and McKee conjectured a formula estimating the probability of primality of the number of rational points on an elliptic curve over a finite field. Their heuristic derivation was based on an analytic class number formula counting bivariate quadratic forms up to equivalence. We will give alternative heuristics in favor of the conjecture, based on a random matrix model. This approach seems better-suited for generalizing the conjecture to curves of higher genus. We will then elaborate this in genus 2.

This is joint work with Hendrik Hubrechts and Alessandra Rigato.

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