"Mathematicians have tried in vain to this day to discover some order in the sequence of prime numbers, and we have reason to believe that it is a mystery into which the mind will never penetrate."
Leonard Euler, in G. Simmons, Calculus Gems, McGrawHill, New York, 1992
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"Prime numbers have always fascinated mathematicians, professional and amateur alike. They appear among the integers, seemingly at random, and yet not quite: there seems to be some order or pattern, just a little below the surface, just a little out of reach."
Underwood Dudley, Elementary Number Theory (Freeman, 1978) p.163
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"Who would have imagined that something as straightforward as the natural numbers (1, 2, 3, 4,...) could give birth to anything so baffling as the prime numbers (2, 3 ,5, 7, 11, ...)?"
Ian Stewart, "Jumping Champions", Scientific American, December 2000
