J-ers and RC-ers, I entered a solution for this task: http://rosettacode.org/wiki/Hamming_numbers .
hamming =: {. (/:~...@~.@] , 2 3 5 * {)/ @ (1x ,~ i...@-) However the problem is (which I didn't realize while entering my solution) producing the millionth hamming number. So if anyone has a better idea on this, go ahead. Of course it's also a challenge to come up with a very J-ish solution for this problem. R.E.Boss perhaps? I used your solution HN00 and it produced the answer in ca. 47 sec on my computer. -- Met vriendelijke groet, =@@i ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm