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>perl -Mntheory=:all -nE 'chomp; say is_prime($_);' input.txt

qwurx [shmem] ~> perl -E "say '$_'" foo.bar

...
foo.bar
qwurx [shmem] ~> perl -E "say $_" foo.bar
foobar

qwurx [shmem] ~> echo '`ls -l /dev/null`'
`ls -l /dev/null`
...
use feature 'current_sub', 'evalbytes', 'fc', 'say', 'state', 'switch'
+, 'unicode_strings', 'unicode_eval';
say say(say(`ls -l /dev/null`));
-e syntax OK