The test suite is broken.
The solution was so simple... I fail sometimes with the RegExp constructions... :-/
I enjoy this part with question mark. Very useful, thanks.
Prime factor digits
Test if a Number is a Palindrome without using any String Operations
Project Euler: Problem 7, Nth prime
Back to basics 24 - Symbolic variables
Better Index Number
Get top 5 Cody Player Emails Automatically
Returning a "greater than" vector
Convert this color - RGB Vector to Hex String
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