By means of local search techniques, five quasi-cyclic codes have been
found that have a higher minimum distance than known binary, linear c
odes. The new codes have parameters [102,17,37], [60,20,17], [84,21,27
], [105,21,36], and[100,25,30]. Also, 39 other quasi-cyclic codes have
been found that improve the parameter sets of previously known quasi-
cyclic codes. Twenty-four of them give a new and easier description of
binary linear codes with best known parameters.