From what I understand of the state of modeling here, it's like verifying primes. It's relatively easy to verify whether a specific number is prime or not, but

From what I understand of the state of modeling here, it's like verifying primes. It's relatively easy to verify whether a specific number is prime or not, but very difficult to generate a new one. Likewise if you know the specific structure of a material, we can model / characterize it but the search space is so large that it's beyond our capabilities to find new candidates.