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alk10

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- TL;DR Summary
- Determining if a list of numbers is a result of multiplication

Suppose I have 2 collections of lists.

In the first collection the lists consists of random integers, with most (but not all) in the range 0-1000.

In the second collection the lists consist of integers calculated in the following way:

a. start with a random integer of similar range to the first list

b. multiply by some unknown fraction, typically (but not always) in the range 0-2.

c. round to the nearest integer

Given a particular list, I would like to be able to predict which collection it comes from.

I have tried taking the modulo from every number between 2-20 and looking at the remainder (as for example if the fraction in b) was exactly 2, then the elements mod 2 would always be zero), but couldn't find a noticeable difference. Would appreciate any ideas.

In the first collection the lists consists of random integers, with most (but not all) in the range 0-1000.

In the second collection the lists consist of integers calculated in the following way:

a. start with a random integer of similar range to the first list

b. multiply by some unknown fraction, typically (but not always) in the range 0-2.

c. round to the nearest integer

Given a particular list, I would like to be able to predict which collection it comes from.

I have tried taking the modulo from every number between 2-20 and looking at the remainder (as for example if the fraction in b) was exactly 2, then the elements mod 2 would always be zero), but couldn't find a noticeable difference. Would appreciate any ideas.