A computer-implemented method for detecting non-negligible election fraud using a computer program product that includes a fraud detection server comprising a processor and a database. The method may include the steps of receiving election results data, aggregating the election results data into a plurality of subsets, calculating a respective hypergeometric cumulative distribution function (CDF) score to define an outlier impact magnitude for each of the plurality of subsets, and ranking the plurality of subsets using the respective hypergeometric CDF score for each of the plurality of subsets. The resultant ranking may define an audit priority for each of the precincts involved in an election of interest. An election report including the audit priority may be displayed to an election stakeholder.