What exactly is making the file so big - is it repeating itself? Is it whitespace?
$ zcat .brainparty.gz|sort|uniq -c|sort -n [...] 4 2146 6 0 8 2267 16 2217 32 2200 64 1617 128 2082 128 2211 256 1921 256 2108 512 2052 1024 2034 2048 1948 2048 2223 2048 2250 4096 2007 8192 1962 16384 2381 32768 1964 32768 2077 65536 2070 131072 1819 131072 2176 262400 2280 524288 1765 1048576 2035