result of Gamma is never more precise than double

20 largest ulp errors (stored in a double)
   1455.50086 ulp for Gamma(164.040279658439) = 2.4611985851116676e+291)
   1394.49996 ulp for Gamma(135.62507755004964) = 4.2730875577261157e+229)
   1332.53404 ulp for Gamma(134.06343791565297) = 2.0287696276183775e+226)
   1108.49988 ulp for Gamma(134.06343791561144) = 2.0287696272059853e+226)
   1013.50031 ulp for Gamma(164.04027965842693) = 2.4611985849600128e+291)
   842.50060 ulp for Gamma(121.76399132195012) = 2.6079571345491178e+200)
   842.49937 ulp for Gamma(164.04027965836622) = 2.4611985841983812e+291)
   742.49998 ulp for Gamma(164.04027965847555) = 2.4611985855699895e+291)
   724.49988 ulp for Gamma(127.46122770950589) = 2.213370143670859e+212)
   684.49955 ulp for Gamma(149.99524688698821) = 3.7193398688777529e+260)
   678.44143 ulp for Gamma(149.99524688698833) = 3.7193398688798669e+260)
   654.51322 ulp for Gamma(171.62437695630237) = 1.7976931348592076e+308)
   632.50083 ulp for Gamma(102.93147267181681) = 7.0007649849934852e+161)
   595.50019 ulp for Gamma(127.46122770944996) = 2.2133701430712224e+212)
   574.49999 ulp for Gamma(149.99524688702147) = 3.7193398694963674e+260)
   536.51997 ulp for Gamma(134.06343791565334) = 2.0287696276218371e+226)
   536.49926 ulp for Gamma(91.713796094073757) = 3.7136825859279051e+139)
   530.69793 ulp for Gamma(134.06343791711623) = 2.0287696421480525e+226)
   530.52985 ulp for Gamma(127.46122770951602) = 2.2133701437795635e+212)
   514.46284 ulp for Gamma(171.62437695630268) = 1.7976931348618644e+308)

<tr><td align=left><a href=Gamma.res>Gamma</a></td><td align=right>1575</td><td align=right>1455.50086</td><td>164.040279658439</td><td>2.4611985851116676e+291</td></tr>