fn karatsuba_len(mut n: usize, threshold: usize) -> usize {
        let mut i = 0;
        while n > threshold {
            n >>= 1;
            i += 1;
        }
        
        n << i
    }
/// karatsubaLen computes an approximation to the maximum k <= n such that
/// k = p<<i for a number p <= threshold and an i >= 0. Thus, the
/// result is the largest number that can be divided repeatedly by 2 before
/// becoming about the value of threshold.
karatsubaLen computes an approximation to the maximum k <= n such that
k = p<= 0. Thus, the
result is the largest number that can be divided repeatedly by 2 before
becoming about the value of threshold.
karatsubaLen computes an approximation to the maximum k < = n such that k = p< = 0 . Thus the result is the largest number that can be divided repeatedly by 2 before becoming about the value of threshold .
fn karatsuba_len(mut n: usize, threshold: usize) -> usize {
        let mut i = 0;
        while n > threshold {
            n >>= 1;
            i += 1;
        }
        n << i
    }
fn karatsuba_len ( mut n : usize , threshold : usize ) -> usize { let mut i = 0 ; while n > threshold { n >>= 1 ; i += 1 ; } n << i }
karatsubaLen computes an approximation to the maximum k <= n such that
k = p<<i for a number p <= threshold and an i >= 0.
karatsubaLen computes an approximation to the maximum k < = n such that k = p<<i for a number p < = threshold and an i > = 0 .
n
usize
threshold
usize
n
usize
threshold
usize