result of log is never more precise than double 1 results were exact to double the precision 20 largest ulp errors (stored in a double) 0.50031 ulp for log(494.794769700016843) = 6.20414306992894993) 0.50030 ulp for log(405.779366979973247) = 6.00580958080573524) 0.50028 ulp for log(6.30543715449980002) = 1.84141230158905422) 0.50027 ulp for log(6.24968839899972561) = 1.83253160634540668) 0.50026 ulp for log(0.647078834200026765) = -0.435287146154171967) 0.50024 ulp for log(0.00754871630001476349) = -4.88637775666545693) 0.50023 ulp for log(5.9492836384998764) = 1.78327081541847399) 0.50022 ulp for log(1.00000006707384692) = 6.70738446716115228e-08) 0.50021 ulp for log(7.69715063049976944) = 2.04085021238794351) 0.50021 ulp for log(0.20622220849999906) = -1.57880100951316571) 0.50020 ulp for log(1.00000005954332205) = 5.9543320278011131e-08) 0.50019 ulp for log(0.741966908100113232) = -0.298450635057113889) 0.50018 ulp for log(371.984589119963573) = 5.91885242631814812) 0.50018 ulp for log(455.712805299969546) = 6.12186279816024026) 0.50017 ulp for log(1.0000060554543142) = 6.0554359800127192e-06) 0.50016 ulp for log(1.6487212707002139) = 0.500000000000051958) 0.50016 ulp for log(8.81375554849720011) = 2.17631363157832425) 0.50015 ulp for log(0.999999991613155004) = -8.38684503143610366e-09) 0.50015 ulp for log(0.547350947299890978) = -0.602665096730792049) 0.50015 ulp for log(0.559076346599994944) = -0.581469238050882353) log11350.50031494.7947697000168436.20414306992894993