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no, first Prime number is 2 NASA considers 1 a prime number, since it has no whole number factors except for itself. Check this : http://en.wikipedia.org/wiki/Prime_number 1 is not a prime number Okay, it is 2, but 1 used to be taught as the first prime number, back when Pluto was recognized as the ninth planet. Outdated info again. Sorry.

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Q: Is 1 the first prime number?
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Related questions

Is 10 the first prime number?

No, ten is not the first prime number or a prime number at all. A prime number is a number with only two factors, 1 and itself. Since ten has 2 and 5 as factors as well as 1 and 10, it is not a prime number. 1 by definition is usually considered not a prime number, so 2 is the first prime number


What is the second prime and odd number?

The first prime number that is odd is 3, so the second odd prime number is 5. Some think 1 is the first prime nunber, but 1 is neither prime nor composite.


First odd prime number?

The first odd prime number is 3, not 1, because 1 has only 1 factor, 1, while prime numbers must have 2 factors, 1 and itself.


In mathematices Which number is the first prime number?

The number two is the first prime number, factors are 1 and itself. One doesn't count.


What does 2 is the f p mean?

2 is the First Prime - the first prime number. A prime number is one which can only be divided by itself and 1.


First prime number?

The first prime number is 2. If you're wondering why 1 is not prime, well, probably because you cannot break a number down if you divide it by 1. When it comes to prime factorization, if you bring 1 into it, the number you start with will stay the same (e.g., If you star a "prime factorization tree" for 100 and start off with 1, you will still have 100. You do not "grow" another "branch.")


Define prime numbers?

A prime number is a number in the set of positive integers such that it is only divisible by 2 unique numbers: itself, and 1. For this reason the first prime number is 2, not 1.


Why does 1 is not included in first five prime numbers?

1 IS NOT a Prime Number because the definition of a Prime Number is that it must have 2 factors, itself and one. Therefore one cannot be a Prime as it only has 1 factor.


What is the first prime number after 1 000 000?

It is: 1,000,003


Which is the first prime number?

2 is the first prime number.


is the number 1 a prime number?

no 1 is not a prime number


What is the first prime number after 14?

The first prime number after 14 is 17.