Palindromic primes

say "{+$_} matching numbers:\n{.batch(10)».fmt('%3d').join: "\n"}"
    given (^1000).grep: { .is-prime and $_ eq .flip };

Output:

20 matching numbers:
  2   3   5   7  11 101 131 151 181 191
313 353 373 383 727 757 787 797 919 929