2002 AMC 10B Problems/Problem 6
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Problem
For how many positive integers 
is 
a prime number?
Solution
Factoring, 
. As primes only have two factors, 
and itself, 
, so 
. Hence, there is only one positive integer . 
See Also
| 2002 AMC 10B (Problems • Resources) | ||
| Preceded by Problem 5 | Followed by Problem 7 | |
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