18!:3'' using 4-byte integer will overflow after about 1200 days.
Get yourself a 64-bit machine (with 8-byte integers) and leave a provision in your will reminding your great^:586549398 grandson to reboot the machine when he's 20 and a half years old. Make sure he leaves a similar provision in his will.
-Dan ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
