At least in Python, the test cases for 121 and 180 are definitely wrong:

test.assert_equals(get_best_combination(121), "201")
test.assert_equals(get_best_combination(180), "300")

The correct solution must be "21" for 121 and "3" for 180.

The descrition should advise that if the given number is prime, then itself is the nearest prime.

In the description, it´s unclear from where to retrive data (table schema - numbers), and also the output schema (in the graphic seems that column should be integer and it is n).

The description is unnecessarily tricky and misleading. To avoid this error you should retrieve both company_id from products and company_name from companies.

I agree. I don´t understand why this suggestion is still unresolved ? Only the kata´s sensei can do it ?

The print sentence was for testing purposes in my PC :-)

which is the name of this feature of the language ?
I ask because the solution liked me, but I don´t know where to study it.

The description is very confusing !! Hours trying to decipher that was just as simple as to reverse the list.

Thanks !! That was right.
Think this Kata should be at least 4 kyu :)

My solution passed 116 of 117 tests. The failed test is the last of Character tests.
The text displayed says:

'abcdaebfcgdheifajbkcldmeX' should equal 'abcdfeefdgchbiaejdkclbmaX'

I can´t figure out what this mean.