- Improvements in Number `lpf(n)` for numbers with less than 45 digits.
- Improvements in Number `lpf(n)` for numbers with less than 45 digits.

For numbers with <= 45 digits, it's easier to just fully factorize them, than running trial division up to 10^8, if they don't have factors <= 10^7.

trizen/sidef,trizen/sidef,trizen/sidef,trizen/sidef