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And at that point, Mettie, what for Mettie, that's messaging extraterrestrial intelligence. And the message was made of 1,679 binary digits, each representing one of the values, one of two values. And a challenge for an intelligent ET would be to determine how to arrange these digits into a meaningful 2D image, a diagram of a human representation of a source of the chemicals that make up DNA, dropping. And the number of 1,679 was chosen because it's a prime number. And these are highly significant mathematics. And this one is also the approximate of two other prime numbers, 23 and 73, by reshaping the sequences of these would render an image. So, so why are prime numbers important? Because by multiplying it together, you get every possible whole number out there. Whole numbers are numbers, every name, it's a non-negative integer.