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## fprime
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### Instructions
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Write a program that takes a positive `int` and displays its prime factors on the standard output, followed by a newline.
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- Factors must be displayed in ascending order and separated by `*`, so that the expression in the output gives the right result.
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- If the number of parameters is not 1, the program displays a newline.
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- The input, when there is one, will always be valid.
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Example of output :
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```console
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student@ubuntu:~/piscine/test$ go build
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student@ubuntu:~/piscine/test$ ./test 225225
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3*3*5*5*7*11*13
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student@ubuntu:~/piscine/test$ ./test 8333325
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3*3*5*5*7*11*13*37
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student@ubuntu:~/piscine/test$ ./test 9539
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9539
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student@ubuntu:~/piscine/test$ ./test 804577
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804577
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student@ubuntu:~/piscine/test$ ./test 42
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2*3*7
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student@ubuntu:~/piscine/test$ ./test
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student@ubuntu:~/piscine/test$
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```
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