func is_magnanimous(n) {
    1..n.ilog10 -> all {|k|
        sum(divmod(n, k.ipow10)).is_prime
    }
}

say "First 45 magnanimous numbers:"
say is_magnanimous.first(45).join(' ')

say "\n241st through 250th magnanimous numbers:"
say is_magnanimous.first(250).last(10).join(' ')

say "\n391st through 400th magnanimous numbers:"
say is_magnanimous.first(400).last(10).join(' ')