###### Asked in Prime Numbers

Prime Numbers

# How were prime numbers first used?

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## Related Questions

###### Asked in Prime Numbers, Numbers , Composite Numbers

### What are a dozen or more facts about prime numbers?

1 Prime numbers have only 2 factors which are themselves and
one
2 Prime numbers can't be composite numbers which have more than
2 factors
3 Prime numbers are odd except for two which is the only even
prime number
4 Prime numbers are used in finding the LCM of 2 or more
numbers
5 Prime numbers are used in finding the HCF of 2 or more
numbers
6 Prime numbers are used in finding the LCD of fractions
7 Prime numbers are used in reducing fraction to their lowest
terms
8 Prime numbers are rational because they can be expressed as
fractions
9 Prime numbers are infinite
10 Prime numbers are irrational when square rooted
11 Prime numbers can't be 0 or 1 which are also not composite
numbers
12 Prime numbers don't follow a forecasted numerical pattern
13 Prime numbers make up 25% of the first 100 integers or whole
numbers
14 Prime numbers have a code amongst themselves that has never
been cracked

###### Asked in Prime Numbers

### How do you calculate the sum of first 20 prime number?

You find the first 20 prime numbers and add them together. There
is no formula for generating a sequence of prime numbers and so
none for the series of their sums.
You find the first 20 prime numbers and add them together. There is
no formula for generating a sequence of prime numbers and so none
for the series of their sums.
You find the first 20 prime numbers and add them together. There is
no formula for generating a sequence of prime numbers and so none
for the series of their sums.
You find the first 20 prime numbers and add them together. There is
no formula for generating a sequence of prime numbers and so none
for the series of their sums.

###### Asked in Math and Arithmetic, Prime Numbers, Numbers

### What are a dozen or more prime facts relevant to prime numbers?

1 Prime numbers have only 2 factors which are themselves and
one
2 Prime numbers are different to composite numbers which have
more than 2 factors
3 Prime numbers are rational because they can be expressed as
improper fractions
4 Prime numbers are integers which are whole numbers
5 Prime numbers are used to find the lowest common multiple of
numbers
6 Prime numbers are used to find the highest common factor of
numbers
7 Prime numbers take up 25% of the first 100 integers
8 Prime numbers are odd except for 2 which is the only even
prime number
9 Prime numbers are used to find the lowest common denominator
of fractions
10 Prime numbers are infinite and don't follow a predictable
pattern
11 Prime numbers do not include 1 because its only factor is
itself
12 Prime numbers when squared are perfect squares
13 Prime numbers when square rooted are irrational
14 Prime numbers can be found in the ancient Roman numeral
system
15 Prime numbers of 2 3 5 7 11 13 17 19 23 29 31 37 41 43 and 47
are the first fifteen prime numbers in ascending order

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