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Ella Frank
Mathematics
8 December, 12:17
Find the prime factorazation of 31
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Alberto Schwartz
8 December, 12:25
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1,31,-1,-31. 31 those are it
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Gunnar Meyers
8 December, 12:28
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31 is a prime number.
How to tell if a number is prime: estimate the square root. In this case, we know the square root of 31 is between 5 and 6 and it isn't divisible by either of those. If it is divisible by a number higher than it's square root, the other factor must be lower. Is it divisible by 4 or 2? no, because it isn't an even number. It's not divisible by 3, because there's a remainder of 1 if you try. You've eliminated all numbers less than the square root, so it is prime
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