Looking for shorter alternatives to `range(...)`
Make it a single loop

As is, you have two loops: one iterating over x that might be palindromic primes, another iterating over i to check if x is prime by trial division. As you noticed, loops is Python take many characters, often to write range, but also to write while _: or for x in _. So, a golfed Python solution should take pains to use as few loops as possible.

feersum's comment "The best-golfed programs often make surprising connections between different part of the programs" is very applicable here. The prime-checking might seem like a separate subroutine for which all(x%i for i in range(2,x)) is the classic expression. But we'll do it another way.

The idea is to use Wilson's Theorem. For each potential prime k, we keep a running product of (k-1)!, and check is it's a multiple of k. We can keep track of (k-1)! while we test potential k to be prime palindromes by keeping a running product P.

Actually, we'll use the stronger version of Wilson's Theorem that (k-1)! % k equals 0 for composite k and only for composite numbers, except k=4 gives 2, and so (k-1)!**2 % k equals 0 exactly for composite numbers. We'll update P to equal k!**2 via the update P*=k*k.

(See this answer for this method used to find primes in Python.)

Putting it all together:

def p(n):
 k=P=1
 while(`k`!=`k`[::-1])+(k&lt;=n)+(P%k==0):P*=k*k;k+=1
 return k


This isn't yet fully golfed -- the condition in particular is written inefficiently.
We can compress the condition to check that k is a palindrome while at the time enforcing the other conditions via a chained inequality.

def p(n):
 k=P=1
 while`k`*(P%k&gt;0&gt;n-k)!=`k`[::-1]:P*=k*k;k+=1
 return k