1813


1813's prime factors are 7 (twice) and 37. However, the US Department of Numeric Integrity, the organization responsible for inspecting numbers and insuring that they are fit for public consumption, has recently introduced a new classification: "choice" factors. While experts believe that 7 is likely to remain prime, opinion is, uh, divided on the question of whether 37 will be downgraded to "choice".


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