73 the best number Big Bang Sheldon t shirt

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73 the best number Big Bang Sheldon t shirts 73 is the best number because: it is the 21st prime number it's mirror, 37, is the 12th prime number it's mirror, 21, is the product of 3 and 7 in binary, 73 is a palindrome – 1001001 That's why 73 is the best number!

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