On Tue, May 27, 2014 at 05:08:16PM +0100, Jasper wrote: > Something like the prime regex would work: > ('1' x $foo) =~ /^(11)*1$/ Ahhh, the Right Sort Of Mad :-) -- David Cantrell | Nth greatest programmer in the world Irregular English: you have anecdotes; they have data; I have proof