Cuban primes: Difference between revisions

Not the most efficient, but concise, and good enough for this task. Use the ntheory library for prime testing; gets it down to around 20 seconds.

<lang perl6>subuse comma { $^i.flip.comb(3).join(',').flip }Lingua::EN::Numbers;

my @cubans = lazy (1..Inf).hyper(:8degree).map({ ($_+1)³ - .³ }).grep: *.is-prime&is_prime;