Sorry for my poor english.
I run code on my pc with different params. Where may be error? Test alltime is wrong. See screenshot: http://rghost.ru/59087997/image.png

I found my error. I was searched all multiples of i<=LIMIT, whereas right i*i<=LIMIT.
Now my code not run firsth test..but i am sure that result is correct.
Please, give me some input data for test.