It looks clearly better!

It looks like Go random test cases are bugged.
Sometimes the expected solution is wrong.
Take a look please.

Really bad description...
Don't approve such katas, please.

php is really too permissive...

You should write tests !

Thanks a lot!
If you could take a look at this kata issue, it would be great :)
https://www.codewars.com/kata/58305403aeb69a460b00019a/discuss/#5ceaa74607d4b7002dd158cd

You would save 1 loop cycle if you returned b :)

The prefix variable is useless, but I like the trick for the decode function :)

I like the sort_by() !
I didn't know we could do it this way.

I run your solution but it didn't pass the tests.
Why is it here ?

I did the contrary too...

Is it possible to have more infos when a test fail in Crystal for test_len()?
It just says:

Testing primes length after check for 6624671
Test Failed
Expected: true
     got: false

It's a bit hard to guess what it expects

Oh yes ! My condition is wrong... Too many operations for me!
Thanks for this quick reply ♡

When I run my function, it founds 36 and 63.
Why isn't it a solution ?