/// <summary>
/// Calculate the factorial up to the given number
/// </summary>
/// <param name="number">The number</param>
/// <returns>The factorial</returns>
public static ReallyBigInt BigFactorial(long number)
{
ReallyBigInt product = new ReallyBigInt("1");
for (long index = 1; index <= number; index++)
{
product = product.Multiplication(new ReallyBigInt(index.ToString()));
}
return(product);
}
/// <summary>
/// Raise a ReallyBitInt to a power
/// </summary>
/// <param name="exponent"></param>
/// <returns></returns>
public ReallyBigInt Power(long exponent)
{
ReallyBigInt one = new ReallyBigInt("1");
ReallyBigInt result = one;
for (long index = 1; index <= exponent; index++)
{
result = result.Multiplication(this);
}
return(result);
}
/// <summary>
/// Raise a ReallyBitInt to a power
/// </summary>
/// <param name="exponent"></param>
/// <returns></returns>
public ReallyBigInt Power(ReallyBigInt exponent)
{
ReallyBigInt one = new ReallyBigInt("1");
ReallyBigInt result = one;
for (ReallyBigInt index = one; index.LessThanOrEqual(exponent); index = index.Addition(one))
{
result = result.Multiplication(this);
}
return(result);
}
/// <summary>
/// Calculate x to the power y
/// </summary>
/// <param name="number">The number</param>
/// <param name="exponent">The exponent</param>
/// <returns>The answer</returns>
public static ReallyBigInt Power(ReallyBigInt number, ReallyBigInt exponent)
{
if (exponent.value.Equals("0"))
{
return(new ReallyBigInt("1"));
}
if (exponent.value.Equals("1"))
{
return(number);
}
ReallyBigInt result = number;
for (ReallyBigInt index = new ReallyBigInt("2"); index.LessThanOrEqual(exponent); index = index.Addition(new ReallyBigInt("1")))
{
result = result.Multiplication(number);
}
return(result);
}