Numbers having exactly three factors are the squares of prime numbers. Examples of these numbers greater than 100 are 121, 169, 289, 361, 529, 841, etc.
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All numbers have common factors greater than zero.
7, 9, 11
Any prime number to the eighth power like 256, 6561 or 390625.
No. To be rectangular a number must have two factors greater than 1. If it has two factors greater than 1, it cannot be prime.
Three numbers that are less than 2 and greater than -1 are -0.5, 0, and 1.5. These numbers fall within the range of -1 and 2 on the number line, satisfying the given conditions.