There is some opinion that the 21 factorization, and the 15 factorization for that matter, depended on knowledge of the correct result[1]. [1] https://crypto.s

There is some opinion that the 21 factorization, and the 15 factorization for that matter, depended on knowledge of the correct result[1]. [1] https://crypto.stackexchange.com/questions/59795/largest-integer-factored-by-shors-algorithm https://crypto.stackexchange.com/questions/59795/largest-int...