This is probably in the wrong section. Anyway, McGill's starting an 'undergrad math magazine' in which I want to contribute a little something I came up called 'Crossnumbers' in its recreation section. The idea is really self-explanatory. I've come up with a few 'interesting' integers already, but if you can think up of something, please contribute! The numbers are to be filled in. The clues are on the right. For example: 999999: The Feynman Point 1729: Smallest integer expressible as the sum of two cubes in two different ways 762: The position in the decimal expansion of a certain number at which the Feynman point occurs 4294967297: First non-prime Fermat number 7427466391: First ten-digit prime in the decimal expansion of e etc.