Testimonials

Your project is wonderful; thank you for making it free and flexible for public use. I use it every day in my 7th grade classroom to assign warm-up problems to students in my class; this particular crop of kids is highly competitive and I was having trouble selecting from a group with all their hands up!

I read your FAQ and I wanted to contribute a little thought: to a computer, would it think it has free will? We store and process information in the same way; so we are running a big program which makes decisions based upon lots and lots of current states and simultaneous inputs. I suspect it is impossible to know whether we have free will from within ourselves and will have to use lots of expensive computer modeling to answer the question, but I'm guessing the answer is no.

—Dan Fruzzetti

I study the life-cycle of viruses, and I perform lots of tissue culture experiments. In order to try to develop theories to explain some results I was getting, I wrote a computer program that uses a Monte Carlo scheme to simulate infection of cells by viruses. I need a different random number for each simulated virus, in order to randomly assign it to a cell that it ‘infects.’ In order for the results to be meaningful, I need to simulate tens of thousands of ‘cells’ and hundreds of thousands of ‘viruses,’ so I need hundreds of thousands of random numbers. The pseudo-random numbers produced by the Apple Macintosh built-in linear congruental generator proved themselves to be not good enough for the job, as I found that some numbers were chosen too often, a definite no-no for my purposes. Then I saw the NY Times article about this site and gave it a try. First I tried using Random.org numbers to seed the Macintosh generator at frequent intervals during the execution of the simulation, but it did not solve the problem. So I tested using all numbers from this site and they passed my quality test. So now I download several batches at a time of 10,000 numbers between 1 and 40,000 and string them into big files as the sources of my numbers. I'd like to be able to download them in even bigger batches, though. Thanks for a truly useful service!

—David N. Levy, University of Alabama at Birmingham