Try print fact6(1, 100); It multiplies everything from the first to the last arguments inclusive. But it will not work if you pass it a Math::BigInt object.

It works by calculating fact6(1,100) as fact6(1,50)*fact6(51,100). Break those up likewise until you have a range of one number, and you know how to calculate that. So there are very few multiplications with very large numbers.

In reply to Re: Re: Re: Factorial algorithm execution time by Anonymous Monk
in thread Factorial algorithm execution time by gri6507

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