alleryWhy would the sieve of Eratosthenes fail if 1 were counted as prime?
AIt would remove all the other numbers
BIt would remove only even numbers
CIt would keep every number in the list
DIt would remove only odd numbers
Answer & Solution
Correct answer: A. It would remove all the other numbers
1. The sieve removes all multiples of each prime it finds.
2. Every number is a multiple of 1, so all other numbers would be crossed out.
3. Only 1 would remain, which is why 1 is not treated as prime.
_Source: Wikipedia, Prime number, section Primality of one_
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