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Use the fast-exponentiation method to raise x to the power y with respect to the modulus modulus. The optional scale can be used to set the number of digits after the decimal place in the result.
Not: Because this method uses the modulus operation, non-natural numbers may give unexpected results. A natural number is any positive non-zero integer.
The following two statements are functionally identical. The bcpowmod() version however, executes in less time and can accept larger parameters.
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bcpow | Upp | bcscale |