result of Gamma is never more precise than double

20 largest ulp errors (stored in a double)
   1007.51430 ulp for Gamma(164.040279658791491) = 2.46119858953288017e+291)
   801.98953 ulp for Gamma(171.624376956302655) = 1.79769313486186445e+308)
   742.49998 ulp for Gamma(164.040279658475555) = 2.46119858556998948e+291)
   660.48660 ulp for Gamma(121.763991321951437) = 2.60795713456616592e+200)
   654.51322 ulp for Gamma(171.62437695630237) = 1.79769313485920759e+308)
   574.49999 ulp for Gamma(149.995246887021466) = 3.71933986949636738e+260)
   530.69793 ulp for Gamma(134.063437917116232) = 2.02876964214805249e+226)
   509.53716 ulp for Gamma(171.624376956302683) = 1.79769313486206882e+308)
   492.49996 ulp for Gamma(135.625077550049639) = 4.27308755772562989e+229)
   480.42868 ulp for Gamma(135.625077549163308) = 4.27308753914401685e+229)
   472.49971 ulp for Gamma(95.832847159702311) = 4.82169199453699892e+147)
   466.50069 ulp for Gamma(135.625077550027441) = 4.27308755725975388e+229)
   455.53404 ulp for Gamma(134.063437915652969) = 2.02876962761814689e+226)
   454.49983 ulp for Gamma(107.262197047543694) = 3.89938829917800549e+170)
   452.50053 ulp for Gamma(134.063437915655896) = 2.02876962764697743e+226)
   444.50086 ulp for Gamma(164.040279658439005) = 2.46119858511138761e+291)
   437.51096 ulp for Gamma(87.6707341875724353) = 4.83784949626082489e+131)
   427.49852 ulp for Gamma(164.040279658439317) = 2.46119858511530492e+291)
   387.49874 ulp for Gamma(84.5999920667431269) = 5.62388999127852771e+125)
   371.50633 ulp for Gamma(107.262197047546593) = 3.89938829923075932e+170)

<tr><td align=left><a href=Gamma.res>Gamma</a></td><td align=right>1575</td><td align=right>1007.51430</td><td>164.040279658791491</td><td>2.46119858953288017e+291</td></tr>