In the old discussion general forum there was banter between Dahn and myself at his birthday (can't remember just when that is) that he was xx years old and he said I was 70
Now he does not remember that.
Dr. Sheldon Cooper "The best # is 73. Why? 73 is the 21st prime #. Its mirror (37) is the 12th and its mirror (21) is 7 times 3
In binary, 73 it's a palindrome, 1001001 backwards is 1001001." like racecar
From the 73rd episode of Big Bang Theory