If you change the prime number 13 to base 7 you get 16. How can 16 be a prime number? Is it that 16 base 7 is a prime number in base 7 math? Can you give an example of how this could be true?
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Count out this many objects:
O O O O O O O
O O O O O O
In base ten, it’s written 13.
In base seven, it’s written 16.
Either way, that number of objects is prime.
No matter the base, you cannot take this many objects and come up with multiple factors for it.
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