is_perfect 33550336
1
   I. is_perfect i. 100000
6 28 496 8128

   ] zero_through_twentynine =. i. 3 10
 0  1  2  3  4  5  6  7  8  9
10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29
   is_perfect zero_through_twentynine
0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 1 0
   is_perfect 191561942608236107294793378084303638130997321548169216x
1