How did scientists discover about prime numbers Edit: that was a weird question….

I actually have no idea. But I imagine that a mathematician found out that some numbers can only be divided by one and itself. But I am not sure.

is 2 the only even prime number

yeah it is the only even prime number

One question about this: is 1 a prime or a composite number? Neither of those numbers.

Its a neither because it is cannot be divisible by 2 natural number or it has only on factor

whats the point of learning about prime and composites if no one really uses them outside of school?

In order to learn how to work with fractions, you need to know the difference between prime & composite numbers. Fractions exist in many real life situations outside of school.

How did prime numbers get the name prime numbers?

prime means something like "only" or "just one" and prime numbers have no other number they are divisible by but themselves and 1. but all whole numbers are divisible by 1.

is 349,860,748,398 a composite or prime?

Composite. It is divisible by other numbers than 2, such as 3.

Is 1 a prime number or a compsite number?

It is neither prime nor composite because it's only factor is 1.

Why is 2 the lone even prime number?

A number is prime only if it can be divided by 1 and itself. Because the only factors of 2 are 1 and 2, 2 matches the definition of a prime number and is, therefore, prime.

Think about all the things that use numbers. All those things use math. You need math to: 1) Keep score in sports 2) Manage your money 3) Design video games, and play video games. 4) All types of engineering use math. Without math, we wouldn't have bridges, buildings, roads, computers, space ships, and many other things that are designed well and built to withstand what ever stresses are placed on them. 5) Advancements in many sciences required math. Those are just a few examples.

Is 31,21,31,41,51,61,71 and 81 prime numbers?

All are prime except for 21, 51, and 81 (all of which are divisible by 3).

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4th grade

Course: 4th grade > Unit 6

Lesson 2: Prime and composite numbers

Prime and composite numbers review

Google Classroom

Review prime and composite numbers, and try some practice problems.

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Sandra Emhenya
Posted 5 years ago. Direct link to Sandra Emhenya's post “How did scientists discov...”
How did scientists discover about prime numbers
Edit: that was a weird question….
Button navigates to signup pageComment on Sandra Emhenya's post “How did scientists discov...”
(67 votes)
Answer
- benjaminyi2009
  Posted 3 years ago. Direct link to benjaminyi2009's post “I actually have no idea. ...”
  I actually have no idea. But I imagine that a mathematician found out that some numbers can only be divided by one and itself. But I am not sure.
  Comment on benjaminyi2009's post “I actually have no idea. ...”
  (44 votes)
hjeisele
Posted 4 years ago. Direct link to hjeisele's post “is 2 the only even prime ...”
is 2 the only even prime number
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(27 votes)
Answer
- 🐬🦩~Kuromi~🦩🐬
  Posted 10 months ago. Direct link to 🐬🦩~Kuromi~🦩🐬's post “yeah it is the only even ...”
  yeah it is the only even prime number
  Comment on 🐬🦩~Kuromi~🦩🐬's post “yeah it is the only even ...”
  (8 votes)
mtessema29
Posted 3 years ago. Direct link to mtessema29's post “One question about this: ...”
One question about this: is 1 a prime or a composite number? Neither of those numbers.
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(17 votes)
Answer
- siva.cryptolot
  Posted 10 months ago. Direct link to siva.cryptolot's post “Its a neither because it ...”
  Its a neither because it is cannot be divisible by 2 natural number or it has only on factor
  Comment on siva.cryptolot's post “Its a neither because it ...”
  (2 votes)
THE LAST KING
Posted 5 years ago. Direct link to THE LAST KING's post “Is 1 a prime number or a ...”
Is 1 a prime number or a compsite number?
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(6 votes)
Answer
- z.summerlin
  Posted 2 years ago. Direct link to z.summerlin's post “It is neither prime nor c...”
  It is neither prime nor composite because it's only factor is 1.
  Comment on z.summerlin's post “It is neither prime nor c...”
  (15 votes)
_305472ain2031
Posted 4 months ago. Direct link to _305472ain2031's post “Why does math exsits”
Why does math exsits
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(4 votes)
Answer
- Kim Seidel
  Posted 4 months ago. Direct link to Kim Seidel's post “Think about all the thing...”
  Think about all the things that use numbers. All those things use math. You need math to:
  1) Keep score in sports
  2) Manage your money
  3) Design video games, and play video games.
  4) All types of engineering use math. Without math, we wouldn't have bridges, buildings, roads, computers, space ships, and many other things that are designed well and built to withstand what ever stresses are placed on them.
  5) Advancements in many sciences required math.
  
  Those are just a few examples.
  Comment on Kim Seidel's post “Think about all the thing...”
  (24 votes)
Marvin Cohen
Posted 6 years ago. Direct link to Marvin Cohen's post “Why is 2 the lone even pr...”
Why is 2 the lone even prime number?
Button navigates to signup pageComment on Marvin Cohen's post “Why is 2 the lone even pr...”
(6 votes)
Answer
- Anthony Fritz
  Posted 6 years ago. Direct link to Anthony Fritz's post “A number is prime only if...”
  A number is prime only if it can be divided by 1 and itself. Because the only factors of 2 are 1 and 2, 2 matches the definition of a prime number and is, therefore, prime.
  Comment on Anthony Fritz's post “A number is prime only if...”
  (15 votes)
meeshamee
Posted 2 years ago. Direct link to meeshamee's post “whats the point of learni...”
whats the point of learning about prime and composites if no one really uses them outside of school?
Button navigates to signup pageComment on meeshamee's post “whats the point of learni...”
(9 votes)
Answer
- Kim Seidel
  Posted 2 years ago. Direct link to Kim Seidel's post “In order to learn how to ...”
  In order to learn how to work with fractions, you need to know the difference between prime & composite numbers. Fractions exist in many real life situations outside of school.
  Comment on Kim Seidel's post “In order to learn how to ...”
  (9 votes)
Urvini Naidu
Posted 3 years ago. Direct link to Urvini Naidu's post “How did prime numbers get...”
How did prime numbers get the name prime numbers?
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(9 votes)
Answer
- loumast17
  Posted 3 years ago. Direct link to loumast17's post “prime means something lik...”
  prime means something like "only" or "just one" and prime numbers have no other number they are divisible by but themselves and 1. but all whole numbers are divisible by 1.
  Comment on loumast17's post “prime means something lik...”
  (5 votes)
Michael Kochan
Posted 4 years ago. Direct link to Michael Kochan's post “is 349,860,748,398 a comp...”
is 349,860,748,398 a composite or prime?
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(7 votes)
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- lucassmithca
  Posted 4 years ago. Direct link to lucassmithca's post “Composite. It is divisibl...”
  Composite. It is divisible by other numbers than 2, such as 3.
  Comment on lucassmithca's post “Composite. It is divisibl...”
  (6 votes)
denverhousecalls
Posted 7 years ago. Direct link to denverhousecalls's post “Is 31,21,31,41,51,61,71 a...”
Is 31,21,31,41,51,61,71 and 81 prime numbers?
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(4 votes)
Answer
- Marvin Cohen
  Posted 4 years ago. Direct link to Marvin Cohen's post “All are prime except for ...”
  All are prime except for 21, 51, and 81 (all of which are divisible by 3).
  Button navigates to signup page
  (12 votes)

4th grade

Course: 4th grade > Unit 6

Prime and composite numbers review

What are prime numbers?

Practice set 1: Identifying prime numbers

What are composite numbers?

Practice set 2: Identifying composite numbers

Want to join the conversation?