"A prime number is a lonely thing. It can be divided by itself or by one. It never truly fits with another. There are two prime numbers, haunted by their own tragedies. Their destinies seem irrevocably intertwined. They recognize in each other a kindred, damaged spirit. So close and desperately attracted to each other. But as prime pairs, they are doomed to be always together, but never touching"

—Paolo Giordano, ”The Solitude of prime numbers”

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