![]() ![]() Step 5: Continue the process of encircling the next uncrossed number and crossing out its multiples till all the numbers in the table are either encircled or crossed out, except 1. Ignore the previously crossed-out numbers like 6, 12, 18, and so on. Step 4: Encircle the next uncrossed number, which is 3, and cross out all its multiples. Step 3: Encircle 2 and cross out all its multiples as they are not prime. Step 2: Leave 1 as it is neither a prime number nor a composite number. In the third century BCE, the Greek mathematician Eratosthenes found a very simple method of finding prime numbers.įollow the given steps to identify the prime numbers between 1 and 100. ![]()
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