18529Re: [PrimeNumbers] number length
- Jan 4, 2007--- Jacques Tramu <jacques.tramu@...> wrote:
> >Can someone calculate the length of N= (2^1660693)*(2^1660693+21)+1?Maybe it does, maybe it doesn't, but it's the wrong tool for the job.
> >I esimated it as [(2*1660693)*((log 2)/(log 10))] as someone suggested
> >and arrived at L(N)= 999,999. How inaccurate is it?
> GMP gives : 998838
Calculating the value of a simple expression you're only going to find the size
of is lazy thinking.
The size of a^b is b times the size of a.
The size of a*b is the sum of the sizes of a and b.
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