Tuesday, October 28, 2008

313

313 is a prime number, as is 10313 + 313.

313 has a representation as a sum of two squares: 313 = 122 + 132.

If 313 people are chosen at random, then the probability that at least five of them will share the same birthday is greater than 50%.

313 is 100111001 in base 2 (binary).

311 and 313 form a twin prime pair.

313 is the hypotenuse of a primitive Pythagorean triple: 3132 = 252 + 3122.

In cartoons featuring Donald Duck, his car often sports the license plate number 313.
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