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

>

> () ASCII ribbon campaign () Hopeless ribbon campaign

> /\ against HTML mail /\ against gratuitous bloodshed

>

> [stolen with permission from Daniel B. Cristofani]

>

> __________________________________________________

> Do You Yahoo!?

> Tired of spam? Yahoo! Mail has the best spam protection around

> http://mail.yahoo.com

>