# How do you identify prime numbers?

##### 1 Answer

Please see below.

#### Explanation:

I understand we are trying to identify larger primes, say at least more than

One of simplest thing that comes to one, who is trying to identify prime numbers, is that a prime number does not have in unit's digit

Another important thing is that one need not try all the primes (other than

If the number is **prime number just below its square root is #m#**, then we should try only till

As if

Even for trying to divide by a somewhat large number, one could check using a calculator and if quotient is in decimal fraction, move to next prime number.