Given a $K$ prime number and $l$ $is$ $even$ that satisfy $l<K$.
Is it possible that all the $l+1$ numbers : $K, K+l, K+2l, K+3l,...,K+l^2 $ are primes?
I assume no, but I am struggling to prove it.
***Except from the case $K=3$ and $l=2$
Thanks in advance!