# Is 51 a prime number?

The number 51 is not considered to be a prime number. Prime numbers are only able to be divided by itself and 1 to obtain a whole number answer. 51 is known as a "composite number" because it can a...
Read More »

http://www.answerbag.com/q_view/2049378

## Is 127 a prime number?

The number 127 is a prime number because it cannot be divided evenly by any number besides one and 127. There are no other numbers that can go into 127 without a remainder.Source:Number Empire: Onl...
Read More »

http://www.answerbag.com/q_view/2077084

## Who discovered the first prime number?

Ancient Greek mathematicians of the Pythagorean school first discovered and studied prime numbers (numbers only divisible by one and themselves). Around 300 B.C., Euclid discovered that there are a...
Read More »

http://www.answerbag.com/q_view/1985052

## Is 22609 a prime number?

The number 22,609 is not a prime number. It is divisible by the numbers 23 and 983, according to the prime number calculator on Math.com. A prime number is divisible only by itself and the number 1...
Read More »

http://www.answerbag.com/q_view/1928575

## How to Check if a Number Is Prime?

There are several methods for testing primality of integers. The best choice depends on the circumstances. Some of the methods are faster than others, while some popular tests are actually only pro...
Read More »

http://www.wikihow.com/Check-if-a-Number-Is-Prime