The number in the article appears to be accurate.
You are assumming that every machine stays on 24 hours a day. There is also
the factor of machines dropping out. Of course, the calculation at
http://www.mersenne.org/primenet/status.shtml could be wrong.
------- Aggregate CPU Statistics, P90 Units* -------
Last 7 Days Average Cumulative Today
from 09 Dec 2001 06h from 15 Dec 2001 06h
---------------------- ----------------------------------
Test Type CPU yr/day GFLOP/s CPU years CPU yr/day GFLOP/s
------------ ---------- ---------- ---------- ---------- ----------
Lucas-Lehmer 190.637 2294.834 177.972 185.910 2237.927
Factoring 13.652 164.338 20.810 21.739 261.683
---------- ---------- ---------- ---------- ----------
TOTALS 204.289 2459.172 198.783 207.648 2499.610
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Daran
Sent: Friday, December 14, 2001 2:13 AM
To: [EMAIL PROTECTED]
Subject: Re: Mersenne: CNET coverage of M39: Very good
----- Original Message -----
From: "Jeff Woods" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, December 13, 2001 6:44 PM
Subject: Mersenne: CNET coverage of M39: Very good
> ...His
> system was part of a 210,000-machine quasi-supercomputer stretched across
> the globe.
[...]
> The Mersenne prime search is moving in that direction. Each day, its
> network of computers does work that would take a single 90MHz Pentium
> computer 200 years to accomplish...
200 X 365 = 73000 p90 days/day
So what are the other 137,000 faster than P90 machines doing?
Regards
Daran
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