No number, other than 1, can be part of a Prime number.
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There is no work. The only prime number ending in 5 is 5.
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Yes
43 is a prime number whose only factors are itself and one
A number which is divisible by itself and 1 is called prime number. A prime number has only two factors.But, 836475 is also divisible by5, i.e. 836475 has more than two factors.Therefore, the given number is not prime.In order to show that given number is not prime there is no need to find all the factors, we should show that given number has more than two factors.