5 p: y (totient function; the number of numbers relatively prime to y) is now faster. The following benchmarks illustrate the improvements.

   timer=: 6!:2
   y=: 2x+i.1e5

   timer '5 p: y'  NB. J7.01
0.796005

   timer '5 p: y'  NB. J6.02
2.7178