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Date: Fri, 23 May 2014 07:27:18 -0700

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cceb8485d460ec43f4c23f49e778129b
No, but it's based on Phi (the "golden ratio").

More about the golden ratio here.

And a really good read for the casual mathematician here.

cceb8485d460ec43f4c23f49e778129b

I found a research paper on random number generators that cceb8485d460ec43f4c23f49e778129b with this assertion. (See page 53.)

share|improve this answer
edited yesterday

12	  	
Do you know why a number based on Phi cceb8485d460ec43f4c23f49e778129b a good choice as a seed? Would it be cceb8485d460ec43f4c23f49e778129b to summarize this here?   Dukeling May 15 at 20:57 
21	  	
@Dukeling The constant is used cceb8485d460ec43f4c23f49e778129b once, to temper the cceb8485d460ec43f4c23f49e778129b seed. My very cceb8485d460ec43f4c23f49e778129b suspicion is cceb8485d460ec43f4c23f49e778129b it was chosen to be a nothing up my sleeve number that cceb8485d460ec43f4c23f49e778129b seeds with cceb8485d460ec43f4c23f49e778129b bits set (perhaps a cceb8485d460ec43f4c23f49e778129b choice) from screwing up the cceb8485d460ec43f4c23f49e778129b cceb8485d460ec43f4c23f49e778129b cceb8485d460ec43f4c23f49e778129b (instead of some magical property of phi).   David Eisenstat May 15 at 21:09 
7	  	
To quote a quote from the said book cceb8485d460ec43f4c23f49e778129b to Knuth any large MBIG and any smaller (but still large) MSEED can be substituted for the above values. So it is mathematical fun, more or less.. So the cceb8485d460ec43f4c23f49e778129b answer should be: No. But it is based on Phi.   TaW May 15 at 21:19 
10	  	
Just took a look through that random number paper - this line stood out a cceb8485d460ec43f4c23f49e778129b -  "One  cant even fathom the cceb8485d460ec43f4c23f49e778129b if security flaws in the implementation (or design) of the SSL  protocol are to be found." (page 4)   jcw May 16 at 19:10 
2	  	
nGuillot relevant xckd: cceb8485d460ec43f4c23f49e778129b.cceb8485d460ec43f4c23f49e778129b/221   DLeh May 16 at 19:58
show 6 more comments

up vote
44
down vote
This number is taken from golden ratio 1.61803398 * 10^8. Matt gave a nice answer what is this number, therefore I will just explain a little bit abocceb8485d460ec43f4c23f49e778129b

This is not a special number for this algorithm. The algorithm is Knuth's subtractive random number generator algorithm and the main points of it are:

store a circular list of 56 random numbers
cceb8485d460ec43f4c23f49e778129b is process of filling the list, then cceb8485d460ec43f4c23f49e778129b those cceb8485d460ec43f4c23f49e778129b with a specific cceb8485d460ec43f4c23f49e778129b algorithm
two indices are kept which are 31 apart
new random number is the difference of the two cceb8485d460ec43f4c23f49e778129b at the two indices
store new random cceb8485d460ec43f4c23f49e778129b in the list
The generator is based on the following cceb8485d460ec43f4c23f49e778129b: Xn = (Xn-55 - Xn-24) mod m, where n  0. This is a partial case of lagged Fibonacci generator: Xnmod m, where 0 < k < jcceb8485d460ec43f4c23f49e778129b binary operation (cceb8485d460ec43f4c23f49e778129b, addition, xor).

There are several cceb8485d460ec43f4c23f49e778129b of this generator. Knuth offers an cceb8485d460ec43f4c23f49e778129b in FORTRAN in his book. I found the following code, with the following comment:

cceb8485d460ec43f4c23f49e778129b to Knuth, any large MBIG, and any smaller (but still large) MSEED can be substituted for the above values.

A little bit more can be cceb8485d460ec43f4c23f49e778129b here Note, that this is not cceb8485d460ec43f4c23f49e778129b a research paper (as stated by Math), this is just a master cceb8485d460ec43f4c23f49e778129b thesis.

People in cceb8485d460ec43f4c23f49e778129b like to use irrational number (pi, e, sqrt(5)) cceb8485d460ec43f4c23f49e778129b there is a conjecture that digits of such numbers appears with equal frequency and thus have high entropy. You can cceb8485d460ec43f4c23f49e778129b this related cceb8485d460ec43f4c23f49e778129b on security cceb8485d460ec43f4c23f49e778129b to learn more about such numbers. Here is a quote: