echo start > output.log

for i in {1..8}
do
   echo "THREADS: $i" >> output.log
   ./y-cruncher custom log:2 -TD:$i |tee >(grep 'Log(2):' >> output.log) >&1
   ./y-cruncher custom gamma -TD:$i |tee >(grep "Euler's Constant:" >> output.log) >&1
done