Nice test cases!
With a more robust Test Suite many/most of the submissions would fail for ignoring the Problem Statement instruction that primes must be less than n. Please add test cases in which the input x (or "n") is itself a prime.
Back to basics 6 - Column Vector
921 Solvers
Sum of diagonal of a square matrix
1340 Solvers
263 Solvers
283 Solvers
314 Solvers
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