primes

Prime Number in R Language (CloudStat)

November 28, 2011 | CloudStat

A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. R Language Code The Prime Function prime = function(n){   n = as.integer(n)   if(n __ 1e8) stop(“n too large”)   primes = re...
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Prime testing function in R

August 20, 2011 | wrathematics

I was hoping to begin tinkering a bit with the multicore package in R beyond some extremely trivial examples.  Thanks to a combination of R’s dumb quirkiness (for example, being worthless on loops), my poor planning, and general bad programming, my Saturday afternoon tinkering project is ultimately worthless in ... [Read more...]

Solving the rectangle puzzle

March 15, 2010 | xi'an

Given the wrong solution provided in Le Monde and comments from readers, I went to look a bit further on the Web for generic solutions to the rectangle problem. The most satisfactory version I have found so far is Mendelsohn’s in Mathematics Magazine, which gives as the maximal number ... [Read more...]

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