Quote:
Do you mean 966 to 400 iterations? Using this system (2.6 GHz, Vista 64bit, moderate load) it took about 35 minutes to get to iteration 385. I'll edit this later when it hits 100....

It's exactly what I want!!!!
TIPS : it is easy to compute the divisor sum sinc primes facto
I use
Sum = [ (
p(a+1)  1) / (
p  1) ] * [ (
q(b+1)  1) / (
q  1) ] * [ (
r(c+1)  1) / (
r  1) ] * ...
You have better???
I go back when I will be faster: this afternoon or this evening