# [RC5] Around the Globe

Jeroen v.d.burg at planet.nl
Thu Dec 19 06:40:57 EST 2002

```What about optimizations
Let asume I optimize the core for all clients with only 1 clock cycle per key
and everybody is running at 3 GHz
That would save 1 sec each 3.000.000.000 keys
4722366482869645213696 keys
1574122160956 sec
26235369349 minutes
437256155 hours
18219006 days
49915 years

To bad such an optimization doesn't give the 49915 P4-3GHz years of credits ;-P

On 18-12-2002 at 11:49 Bruce Wilson wrote:

>Did you factor in that each notch on a key holds about 2^3 bits (10
>possible depths) of information?  How about the number of cuts per
>inch?
>
>How long would a single key be if it needed to encode 2^72 bits of
>information?
>
>(Have fun at work)
>
>
>__
>Bruce Wilson <bwilson at distributed.net>
>PGP KeyID: 5430B995, http://www.toomuchblue.com/
>
>"I want to move to Theory. Everything works in Theory."
>    --John Cash, id Software
>
>| -----Original Message-----
>| From: owner-rc5 at lists.distributed.net
>| [mailto:owner-rc5 at lists.distributed.net] On Behalf Of Greg Lobring
>| Sent: Wednesday, December 18, 2002 10:49
>| To: rc5 at lists.distributed.net
>| Subject: [RC5] Around the Globe
>|
>|
>| Lets assume the distance around the Earth at it's equator is 40,074
>| kilometers (~24,900.8 miles).
>|
>| Lets imagine an RC5-72 key really looked like an actual
>| physical key (the
>| kind that opens doors). And lets say these keys are each 3
>| inches long
>| (~7.62 centimeters). At this measurement, it would take
>| ~525,903,333 keys
>| laid end to end to circle the Earth at it's equator.
>|
>| As there are 4,722,366,482,869,640,000,000 keys, if you laid them
>| end-to-end, they would circle the Earth a little under 9
>| trillion times
>| ~8,979,533,278,365 times to be more precise).
>|
>| You know what? That is a lot of keys.
>|
>| Heh, its a slow day at work. I think my math is correct.
>|
>|
>|
>|
>|
>| >From: "Christian Wirth" <wirthi at gmx.at>
>| >To: <rc5 at lists.distributed.net>
>| >Subject: Re: [RC5] Thanks
>| >Date: Wed, 18 Dec 2002 13:19:38 +0100
>| >
>| >Yea, I fully agree!
>| >
>| >Of course it's important the project is running, the stats
>| are online &
>| >working correctly, and so on.
>| >
>| >But even more important for us is that you report us (from
>| time to time)
>| >what is going on. I personaly prefer "sorry guys, didn't
>| have any time,
>| >perhaps next week" than not knowing what's going on.
>| >
>| >Keep up the good work,
>| >Christian Wirth
>| >
>| >----- Original Message -----
>| >From: "James Healy" <jimmy at deefa.com>
>| >To: <rc5 at lists.distributed.net>
>| >Sent: Wednesday, December 18, 2002 1:47 AM
>| >Subject: [RC5] Thanks
>| >
>| >
>| > > Just wanted to thank the dnet staff for all the .plan updates
>and
>| > > feedback the user base has been receiving in recent weeks.
>| > >
>| > > It's exactly what is needed to help keep everyone interested...
>I
>| > > spose the fixing of the .plans mailing list also helped
>| the process...
>| > >
>| > > thanks!
>| > >
>| > > James
>| > >
>| > > --
>| > > To unsubscribe, send 'unsubscribe rc5' to
>| >majordomo at lists.distributed.net
>| > > rc5-digest subscribers replace rc5 with rc5-digest
>| > >
>| >
>| >--
>| >To unsubscribe, send 'unsubscribe rc5' to
>| majordomo at lists.distributed.net
>| >rc5-digest subscribers replace rc5 with rc5-digest
>|
>|
>| _________________________________________________________________
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>|
>| --
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>|
>|
>
>
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