<Li> <P> Olly Murs (2015) </P> </Li> <P> Olly Murs (2015) </P> <P> In each series, each judge is allocated a category to mentor and chooses a small number of acts (three or four, depending on the series) to progress to the live finals . From series 1 - 11 and 13 onwards, these categories were decided by the producers of the show . In series 12 viewers voted via hashtags on Twitter to determine which of the judges is allocated each of the four categories . This table shows, for each series, which category each judge was allocated and which acts he or she put through to the live finals . </P> <Dl> <Dd>--Winning judge / category . Winners are in bold, eliminated contestants in small font . </Dd> </Dl>

Who do the judges have in x factor