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    WITH RECURSIVE numbers AS ( SELECT 2 AS n UNION ALL SELECT n + 1 FROM numbers WHERE n < 1000 ), primes AS ( SELECT n FROM numbers WHERE n NOT IN ( SELECT n1.n FROM numbers n1 JOIN numbers n2 ON n2.n < n1.n AND n1.n % n2.n = 0 WHERE n2.n > 1 ) ) SELECT GROUP_CONCAT(n SEPARATOR '&') AS prime_numbers FROM primes;