Is "1" a prime number?

Test Preparation
1

<p>Is "1" a prime number?
It noted in PR book that 1 is not a prime number.......is that true?</p>

2

<p>Yes. 1 is generally not considered prime or composite.</p>

3

<p>is it because a prime number can only be divisible by its original number and 1? and 1 cannot be considered a prime number since it can only be divisible by itself, unlike 13 which has two different numbers to divide by.i hope that is the right reasoning...</p>

4

<p>1 is not prime <a href="http://mathworld.wolfram.com/PrimeNumber.html%5B/url%5D"&gt;http://mathworld.wolfram.com/PrimeNumber.html&lt;/a&gt;&lt;/p>

5

<p>sweet..i guess my reasoning was correct!</p>

6

<p>1 is NOT a prime number; it is a "unity."</p>

7

<p>1 is not a prime number. why? a prime number needs to have two factors.</p>

8

<p>is 60 a prime number</p>

9

<p>60 is not prime. it can be divided by more than just 1 and itself.</p>

10

<p>superly thinks he's funny...I can tell lol</p>

11

<p>What is the first ten digit prime number that appears in consecutive digits of e?</p>

<p>I feel like this is something I must know for tomorrow's SAT.</p>

12

<p>I See What You Did There</p>

13

<p>O Rly.....</p>

14

<p>no, definitely not</p>

15

<p>remember, 2 is prime, an often confused fact</p>

16

<p>Just put a list of Primes in your calculator. Although you never need them up to 100, especially for the regular SAT compared to the II's, having them all in a list allows me to quickly see what/how many are between certain numbers for when they ask. I have had three prime-related questions during my SAT/SAT II takings.</p>

17

<p>7427466391
No, I didn't do it by hand... I made a java program.</p>