this approach doesn't work for some rare random tests, e.g.

788475518165507479605671527362695855574970537266616882768363645977548067
36

(Expected: [49, 84], instead got: [48, 83])

This is an absolutely great write up and I really appreciate you taking the time to write all that down for us!

Needs some tests with noncorrect words thrown in to up the difficulty

Great solution. I forgot all about that array with pipe regex concept!

So the inner loop is the prime factors for a single number, then the outer loop is repeating the process for all the numbers from 2..n? Trying to wrap my head around the concept.

got it, totally makes sense

because index of a range starts at zero, an n length range starting at i will go from i to i + n-1

How did you arrive at this ?

(i..(i + (n - 1)))

This is very creative and a great idea!

oh man, i love this solution

Still learning regex, can you explain the positive lookahead with nothing to look ahead to? Why does split(/[A-Z]/) not work?

How many words out there have 5000 letters?