The term ``product'' refers to the result of one or more Multiplications. For example, the mathematical statement would be read `` Times Equals ,'' where is the product.

The product symbol is defined by

Useful product identities include

For , then the products and converge and diverge as .

**References**

Guy, R. K. ``Products Taken over Primes.'' §B87 in
*Unsolved Problems in Number Theory, 2nd ed.* New York: Springer-Verlag, pp. 102-103, 1994.

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1999-05-26