The probability that a random integer N is prime is roughly 1/ln(N), where ln(N) is the natural logarithm (base ''e'') of N.<ref>http://home.att.net/~numericana/answer/primes.htm</ref> This is also known as the [[prime number theorem]].
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The probability that a random integer N is prime is roughly 1/ln(N), where ln(N) is the natural logarithm (base ''e'') of N.<ref>http://home.att.net/~numericana/answer/primes.htm</ref> This is a formulation of a more general statement known as the [[prime number theorem]].