Test of precomputed factorial vs tgamma outcommented because tgamma is too...

Test of precomputed factorial vs tgamma outcommented because tgamma is too unprecise under glibc 2.12. Instead, test 150! vs value from Wolfram Alpha.

Tests/UnitTests/TestCore/PrecomputedTest.h

@@ -19,8 +19,12 @@ TEST_F(PrecomputedTest, Factorial)
     EXPECT_DOUBLE_EQ(precomputed.factorial[1], 1.);
     EXPECT_DOUBLE_EQ(precomputed.factorial[2], 2.);
     EXPECT_DOUBLE_EQ(precomputed.factorial[3], 6.);
+    /* the following disabled because tgamma is too unprecise under
+       old versions of glibc (at leat up to 2.12, but less than 2.22)
     for( size_t k=4; k<precomputed.factorial.size(); ++k )
         EXPECT_NEAR(precomputed.factorial[k], tgamma(k+1.), 12*eps*tgamma(k+1.) );
+    */
+    EXPECT_NEAR(precomputed.factorial[150], 5.71338395644585459e262, 4*eps*precomputed.factorial[150]);
 }
 
 #endif