func is_prime_digital(n) { n.is_prime && n.digits.all { .is_prime } } say is_prime_digital.first(25).join(',') say is_prime_digital.nth(100)
2,3,5,7,23,37,53,73,223,227,233,257,277,337,353,373,523,557,577,727,733,757,773,2237,2273 33223
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