Is the test suite broken? The first line sets the input to 141221242 for all of the tests.
It worked fine with me. Maybe it was fixed.
The first test case has been updated to not have global scope.
Prime factor digits
Swap the input arguments
Back to basics 19 - character types
Rotate a Matrix
Circular Primes (based on Project Euler, problem 35)
That's some divisor you've got there...
Numbers in extended form
Hackathon - String version
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