I am still getting this issue. Local tests ok, submission error.

I have a similar problem but in this case both numbers ARE prime. I double checked.

(6, 100, 110)

101 is a prime number.

101 + 6 = 107

107 is also a prime number

My function is returning [ 101, 107 ] (both prime numbers between 100 and 110 with an interval of 6).
Still, the kata points an error "expected [ 101, 107 ] to deeply equal null".
I dont understand :(

Just figured it out. There can be no primes in between.
Sorry