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73 is cool because it’s the 21st prime, and its mirror, 37, is the 12th. Plus, 21 (its mirror) is 7 x 3! Oh, and in binary, 73 is a palindrome too. Pretty near, right?
That’s so cool!
That's actually awesome. 73 is now my new favorite prime number.
73 is cool because it’s the 21st prime, and its mirror, 37, is the 12th. Plus, 21 (its mirror) is 7 x 3! Oh, and in binary, 73 is a palindrome too. Pretty near, right?