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NIsaNumber:APortraitofPaulErdősisa1993documentarydirectedbyGeorgePaulCsicseryaboutthelifeofmathematicianPaulErdős.<br/> Erdőshimselfappearsinthefilm.Asof2007,usingtheofficialcastlistinthecredits,itgivesErdősaBaconnumber(andthusErdős-Baconnumber)of4.However,SirAlecGuinness,identifiedbynamebythenarrator,appearsinthefilm,gettinganhonorarydoctoratewithErdős;hispresencewouldgiveErdősaBaconnumberof3.SinceFrost/Nixonwasreleasedinlate2008,ErdőshasaBaconnumberof3throughofficialcredits.