"The best number is 73. Why? 73 is the 21st prime number. It's mirror, 37, is the 12th and its mirror, 21, is the product 

of multiplying 7 and 3...and in binary 73 is a palindrome, 1001001, which backwards is 1001001."

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100% Cotton Shirt

Professionally Screen Printed Design

Machine Washable at 30°C