[challenge] Hamming numbers

[Don]

bearophile wrote:
> Don:
>> That's not a very useful problem, because the timing depends entirely on 
>> BigInt, which is completely unoptimised for small values.
> 
> You are usually right, but this time what you say is useless. There are other means to judge how good a program is, beside running time:
> - Total line count of the program;
> - Max amount of memory used.

Well, I would hate for somebody to waste their time trying to optimise 
that problem either for speed or memory consumption, when both are 
limited by a fairly simple, short-term library issue.

Lines of code, sure.