The highest number that will terminate at 25 is 123:

123 1111011 111 x 1011 7 x 11

77 1001101 1001 x 101 9 x 5

45 101101 101 x 101 5 x 5

25 11001 stop

The highest number that will stop at 32 is 965:

965 1111000101 111 x 1000101 7 x 69

483 111100011 111 x 100011 7 x 35

245 11110101 111 x 10101 7 x 21

147 10010011 100100 x 11 36 x 3

108 1101100 110 x 1100 6 x 12

72 1001000 100 x 1000 4 x 8

32 100000 stop