0
What prime numbers less than 20 can be written as a sum of different primes?
Wiki User
∙ 7y ago
5, 7, 13, 17 and 19 can be so written.
Wiki User
∙ 7y ago
Add your answer:
Earn +20 pts
What are numbers that have 2 4 8 factors?
Numbers that have 2 factors are prime numbers; Numbers that have 4 factors are either: * the cube of a prime; or * the product of two different primes; Numbers that have 8 factors are either: * a prime to the power 7; * the product of a prime cubed and different prime; * the product of three different primes.
The largest integer that is not the product of two or more different primes?
The largest integer that is not the product of two or more different primes would be the largest prime number. Because there are an infinite number of prime numbers, there is no largest integer that is not the product of two or more different primes.
Are 11 and 13 twin primes?
The numbers 11 and 13 are prime twins. Prime twins are consecutive prime numbers that differ by a difference of two. For example, 3 and 5, 7 and 9 are twin primes.
Numbers that have exactly 4 factors?
They are numbers that are the product of two different prime numbers. If the primes are p and q, the four factors are 1, p, q and pq.
What times what equals 1001?
All numbers except primes themselves can be written as a multiple of two or more primes. So you just need to try dividing the number by prime numbers. Trying 13 gives 1001 = 13*77 = 13*7*11. 13, 7 and 11 are all prime numbers, so you know you have found the unique prime factorization of 1001.
What are numbers that have 2 4 8 factors?
Numbers that have 2 factors are prime numbers; Numbers that have 4 factors are either: * the cube of a prime; or * the product of two different primes; Numbers that have 8 factors are either: * a prime to the power 7; * the product of a prime cubed and different prime; * the product of three different primes.
How many of the prime numbers between 10 and 20 can be written as the sum of two primes?
All prime numbers greater than 2 are odd numbers. For an odd prime to be written as the sum of two primes, one of the primes must be 2 because two odd primes will produce an even sum. 11 cannot be written as the sum of two primes. 13 = 2 + 11. 17 cannot be written as the sum of two primes. 19 = 2 + 17.
How many ways can 24 be written as the sum of two different prime numbers?
Two, if the order of the primes is ignored.
What number has the product of exactly three different prime numbers?
Since there are infinitely many primes, there are infinitely many numbers that are products of 3 primes.
The largest integer that is not the product of two or more different primes?
The largest integer that is not the product of two or more different primes would be the largest prime number. Because there are an infinite number of prime numbers, there is no largest integer that is not the product of two or more different primes.
What has the author Marvin Wunderlinck written?
Marvin Wunderlinck has written: 'Table of all primes less or = 10[superscript 6]' -- subject(s): Numbers, Prime, Prime Numbers, Tables
How many prime numbers are there under 1000?
There are 168 prime numbers under 1,000 . There are also 25 primes under 100, 62 primes under 300, and 95 primes under 500
If some integers are prime then are all numbers primes?
No.
Why are 3 and 5 twin primes?
Because the definition of twin primes is: two prime numbers with a difference of 2. 3 and 5 are both prime numbers, and their difference is 5 - 3 = 2 → they are twin primes.
Is 71 and 73 twin primes?
twin primes are 2 prime numbers with a difference of 2 the prime numbers 5 and 3 are twin primes because 5 minus 3 equals 2 so 109 and 111 are not twin primes
What is a mirror prime number and do both numbers have to be prime in the answer and what are the mirror primes from 1-100?
Mirror primes are pairs of prime numbers whose digits are reversed. (13,31)(17,71)(37,73)(79,97)
How many different pairs of prime numbers goes into 50?
There is only 1 pair of primes and they are 2*5.
