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Re: number length

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  • pbtoau
    I get about 6.5*10^999836. This would indicate a length of 999837 digits. - David ... +1? ... suggested ... job. ... find the size
    Message 1 of 5 , Jan 6, 2007
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      I get about 6.5*10^999836. This would indicate a length of 999837
      digits.

      - David
      --- In primenumbers@yahoogroups.com, Phil Carmody <thefatphil@...>
      wrote:
      >
      > --- Jacques Tramu <jacques.tramu@...> wrote:
      > > >Can someone calculate the length of N= (2^1660693)*(2^1660693+21)
      +1?
      > >
      > > >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
      >
      > Maybe it does, maybe it doesn't, but it's the wrong tool for the
      job.
      >
      > 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.
      >
      > Phil
      >
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