Quote:
Originally Posted by Greenbank
2^55 = 3.6E16
So if you've done to 3e15 then you've only done 8.3%

No! 2^55>3.6E16
You have to use a larger number than 1+2^n, if you want to search the full range for n.
I think Robert444444uk correctly search this interval for n=55, but he mistyped here ( just seeing previous submissions from him ), 3e15 isn't a large range for him.
And you can also use my formula to give a prediction for the total number.
Using my formula it'll be about
: f(55)=772430 ( if we are using rounding instead of floor )
So the size of the file will be larger than the size of all previous files altogether ( up to n=54 )