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AMC prime factorization problems

92 past AMC problems use prime factorization. 44 come from the AMC 10 and 48 from the AMC 12.

Picks a problem you have not seen, at about the difficulty you are handling.

60 most recent problems

Newest contests first. Every problem opens with its answer choices, hints and a worked solution.

Use Start prime factorization practice above to work through the remaining 32.

Back to all number theory problems.