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Author Topic: 1760 PS3s = supercomputer  (Read 12153 times)

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Offline willrandship

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Re: 1760 PS3s = supercomputer
« Reply #15 on: January 10, 2011, 09:53:02 pm »
Not really, no. Prime number stuff would only require the amount of RAM necessary for storing the two numbers (Prime and what you're testing) and whatever your multiple precision math function takes. Maybe 10 MB max depending on your numbers and MP function.

Sieves would probably take more though.
« Last Edit: January 10, 2011, 09:53:24 pm by willrandship »
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Offline Goplat

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Re: 1760 PS3s = supercomputer
« Reply #16 on: January 10, 2011, 10:40:29 pm »
Quote from: willrandship on January 10, 2011, 09:53:02 pm
Not really, no. Prime number stuff would only require the amount of RAM necessary for storing the two numbers (Prime and what you're testing) and whatever your multiple precision math function takes.

Nobody factors large numbers by trying to divide by all possible primes. If you turned the entire Earth into a giant supercomputer cluster, with every gram of matter being another processor, and let it run for a trillion years, it still could not have factored even a measly 400-bit key this way. No joke.

Quote
Sieves would probably take more though.

Indeed. The recent factorization of RSA-768 couldn't even fit in RAM, it took about 5 terabytes of disk space as storage.
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Offline willrandship

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Re: 1760 PS3s = supercomputer
« Reply #17 on: January 10, 2011, 10:42:11 pm »
Oh, I meant semiprime, as in the public key, not all the primes.

Shudder at that disk space.

Here's an Idea. When I become fabulously rich i'll go buy it from TI :P
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Offline z80man

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Re: 1760 PS3s = supercomputer
« Reply #18 on: January 11, 2011, 01:11:40 am »
Quote from: willrandship on January 10, 2011, 10:42:11 pm
Oh, I meant semiprime, as in the public key, not all the primes.

Shudder at that disk space.

Here's an Idea. When I become fabulously rich i'll go buy it from TI :P
For the right price i'm sure TI would sell you the RSA key, but soon after they would release a patch changing it.  <_< I have an idea, how about when you become fabulousy rich you buy TI.  :hyper:
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Offline jnesselr

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Re: 1760 PS3s = supercomputer
« Reply #19 on: January 11, 2011, 12:58:58 pm »
Quote from: z80man on January 11, 2011, 01:11:40 am
Quote from: willrandship on January 10, 2011, 10:42:11 pm
Oh, I meant semiprime, as in the public key, not all the primes.

Shudder at that disk space.

Here's an Idea. When I become fabulously rich i'll go buy it from TI :P
For the right price i'm sure TI would sell you the RSA key, but soon after they would release a patch changing it.  <_< I have an idea, how about when you become fabulousy rich you buy TI.  :hyper:
Oooh, much better idea.
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