The Hailstone sequence is defined as such: For any positive integer, if it is even, divide by 2. If it is odd, multiply by 3 and add 1. Repeat the process on the result. As far as mathematicians have been able to determine, every sequence will end in the 4,2,1,4,2,1,4,2,1... - but nobody has ever been able to prove that all positive integers MUST end in this sequence. To see the results of "hailstoning" a number, enter the number to be "hailstoned" and click on "Go!".

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