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#1 Re: This is Cool » enhance your experience with one maths constant » 2014-12-07 12:39:39

I am proud to say, due to some fluke of providence, the MRB constant was more famous on Wikipedia on Dec 4, 2014 than was pi!
Compare the December 4 traffic statistic in these two websites:
The first one is and the second one is the following.

#2 This is Cool » enhance your experience with one maths constant » 2014-11-24 12:45:20

Replies: 1

Follow the frames and links at to find out all that is known about this new constant a/k/a the M/R/B!
If you find out more and post it here I will link to it as well!

#3 This is Cool » World Record computation? » 2014-09-24 06:43:37

Replies: 1

I would like to announce a new unofficial record computation of the MRB constant that was finished on Sun 21 Sep 2014 18:35:06. I wonder if you can do better. It took 1 month 27 days 2 hours 45 minutes 15 seconds. I computed 3,014,991 digits of the MRB constant, (confirming my previous 2,00,000 or more digit computation was actually accurate to 2,009,993 digits), with Mathematica 10.0. I Used my version of Richard Crandall's code:


(*Fastest (at MRB's end) as of 25 Jul 2014.*)


prec = 3000000;(*Number of required decimals.*)ClearSystemCache[];

T0 = SessionTime[];

expM[pre_] :=

  Module[{a, d, s, k, bb, c, n, end, iprec, xvals, x, pc, cores = 12,

    tsize = 2^7, chunksize, start = 1, ll, ctab,

    pr = Floor[1.005 pre]}, chunksize = cores*tsize;

   n = Floor[1.32 pr];

   end = Ceiling[n/chunksize];

   Print["Iterations required: ", n];

   Print["end ", end];

   Print[end*chunksize]; d = ChebyshevT[n, 3];

   {b, c, s} = {SetPrecision[-1, 1.1*n], -d, 0};

   iprec = Ceiling[pr/27];

   Do[xvals = Flatten[ParallelTable[Table[ll = start + j*tsize + l;

        x = N[E^(Log[ll]/(ll)), iprec];

        pc = iprec;

        While[pc < pr, pc = Min[3 pc, pr];

         x = SetPrecision[x, pc];

         y = x^ll - ll;

         x = x (1 - 2 y/((ll + 1) y + 2 ll ll));];(*N[Exp[Log[ll]/ll],

        pr]*)x, {l, 0, tsize - 1}], {j, 0, cores - 1},

       Method -> "EvaluationsPerKernel" -> 4]];

    ctab = ParallelTable[Table[c = b - c;

       ll = start + l - 2;

       b *= 2 (ll + n) (ll - n)/((ll + 1) (2 ll + 1));

       c, {l, chunksize}], Method -> "EvaluationsPerKernel" -> 2];

    s += ctab.(xvals - 1);

    start += chunksize;

    Print["done iter ", k*chunksize, " ", SessionTime[] - T0];, {k, 0,

      end - 1}];

   N[-s/d, pr]];

t2 = Timing[MRBtest2 = expM[prec];]; DateString[]


MRBtest2 - MRBtest2M


I used a six core Intel(R) Core(TM) i7-3930K CPU @ 3.20 GHz 3.20 GHz with 64 GB of RAM of which only 16 GB was used.

t2 From the computation was {1.961004112059*10^6, Null}.

#4 This is Cool » Special partial sums » 2014-09-10 12:24:12

Replies: 0

For all real a, the partial sums s(n)= sum((-1)^k (k^(1/k) -a), k=1..n) are bounded so that their limit points form an interval [-1.+  the MRB constant +a, MRB constant] of length 1-a, where the MRB constant is limit(sum((-1)^k*(k^(1/k)), k = 1 ..2*N),N=infinity).

For all complex z, the upper limit point of  sn= sum((-1)^k (k^(1/k) -z), k=1..n) is the  the MRB constant.

#5 This is Cool » An Infinitude of new Constants! » 2011-05-27 13:56:29

Replies: 0

The convergents constants are discussed at . Study the linked pages to see the pattern of the convergents constants that is emerging from the study.

#6 This is Cool » New Constants Found » 2011-05-14 13:27:00

Replies: 1

According to Mathworld a mathematical constant is any well-defined real number which is significantly interesting in some way.
Here is an article about set of new constants.

#7 This is Cool » Odd way to look at normalcy » 2011-03-23 08:14:53

Replies: 0

Here is a Demo that compares the first several digits of the MRB constant (MRB) to Pi as far as normality is concerned.
This is an attempt to compute the rationality of MRB. However, even if it computed quadrillions of digits it still would be insufficient for the task. So enjoy playing with it!

#8 This is Cool » Life long project, I'm told » 2011-02-09 13:53:04

Replies: 1

The official definition of the MRB constant is found in Mathworld at
For a couple of years now, you could read more about it in Wikipedia at, and you still can.
However, in the Wikipedia article someone asked for a reference for the irrationality of the MRB constant. At first I thought, I could write an expert or two and they could give me a quick proof of its irrationality; however, when I wrote one of the leading experts on constants about the issue, he told me that it could take a lifetime for someone to prove, and even then the proof might not be right. Thus I figured I’ve no time to waste. I started to write down some ideas that might help prove it on mapleprimes at
You might not be too familiar with writing proofs, but a proof is simply an explanation of why some statement is true using  only statements that are known to be absolutely true. If on the other hand you think you might be able to help me with it, please do so.

I could use all the help I can get so please consider passing this along, and I thank you in advance.
Marvin Ray Burns

#9 This is Cool » Learning the basics of mathematical proofs = enhance your discoveries » 2011-01-31 16:33:33

Replies: 0

For example here is a very scenic route to the MRB constant:

#10 This is Cool » How to discover something new! » 2011-01-17 14:39:40

Replies: 0

I thought you could learn from my latest tweet:
New constant found! See the whole mistake ridden process at click here .up

#11 Re: This is Cool » Proof without words - 2 » 2011-01-14 16:32:48

You must be careful, but many proofs can be made by pictures alone. You must use caution because picture proofs can charm your intuition which can be easily fooled and furthermore, it is easy to ignore important conditions to your theorems!

#12 Re: This is Cool » Is It Possible To Calculate The End of The Earth's Existence!? » 2011-01-10 03:16:45

GeniusIsBack mentioned the pandemonium that would accompany a known end of the world date. With the weapons that people have, the resulting bedlam could hasten the epoch. Then the world would end before that date. Hmm?faint

#13 Re: This is Cool » Is It Possible To Calculate The End of The Earth's Existence!? » 2011-01-10 02:38:05

Wolfram Aplha has an answer to when the world will end; see .
It does use one assumption, however.

#14 This is Cool » Be the first to describe a new constant or maybe something better. » 2011-01-09 15:32:58

Replies: 1

It is likely that almost all mathematics has only been around at most 10,000 years.
At 25 years per generation that comes to only 400 generations of mathematicians, and that's assuming there existed mathematicians in every generation. So humanity has only had at most 400 chances to discover all there is to know about math. So the probability is approximately 1/400 that you potentially could discover something nobody else has. Compared to the lottery those are great odds!
I suggest that you spend a few minutes every day playing with math. Even if you don’t discover anything really new, you will be smarter because of it.
To see what happened as I was playing with math, look up “MRB constant” in almost any search engine.
Marvin Ray Burns
I'm the original investigator of the MRB constant.

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