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Composite Numbers
Composite Numbers are some special numbers which have more than 2 factors which consists of at least 1 prime factor.They are often referred as Non-prime Numbers.
4,066 Questions
Why are prime numbers used to create codes comparied to composite numbers?
Consider two very large primes, P and Q, each a hundred of digits or more in length. Their product is the semi-prime S. Given S, it is extremely difficult to find P or Q. If P and Q are sufficiently large, even very fast computers will take a long time to factorise S.
But, given S and P it is simple to find Q. So if S is used for encryption and P is the key, then anyone who knows P can easily decrypt the message but someone who does not know P will be unable to do so.
Consider two very large primes, P and Q, each a hundred of digits or more in length. Their product is the semi-prime S. Given S, it is extremely difficult to find P or Q. If P and Q are sufficiently large, even very fast computers will take a long time to factorise S.
But, given S and P it is simple to find Q. So if S is used for encryption and P is the key, then anyone who knows P can easily decrypt the message but someone who does not know P will be unable to do so.
Consider two very large primes, P and Q, each a hundred of digits or more in length. Their product is the semi-prime S. Given S, it is extremely difficult to find P or Q. If P and Q are sufficiently large, even very fast computers will take a long time to factorise S.
But, given S and P it is simple to find Q. So if S is used for encryption and P is the key, then anyone who knows P can easily decrypt the message but someone who does not know P will be unable to do so.
Consider two very large primes, P and Q, each a hundred of digits or more in length. Their product is the semi-prime S. Given S, it is extremely difficult to find P or Q. If P and Q are sufficiently large, even very fast computers will take a long time to factorise S.
But, given S and P it is simple to find Q. So if S is used for encryption and P is the key, then anyone who knows P can easily decrypt the message but someone who does not know P will be unable to do so.
Which is a composite number 21 or 2?
21 is the composite number because it's an odd number. 2 cannot be a composite number because it's even.
Is 485 a prime number or a composite number?
485 is divisible by 5, and therefore cannot be a prime number.
State whether the following numbers are prime or composite 46?
46 is a composite number because it has at least one positive factor other than one or itself.
4255 is composite. All positive, whole numbers greater than five and ending in 0, 2, 4, 5, 6 or 8 are composite.
What is the smallest number divisible by both 16and 24?
smallestnumber divisible by both 16 a
nd 24 = 48
Prime factorizatio
n of:
16 = 2 * 2 * 2 * 2
24 = 2 * 2 * 2 .....* 3
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LCM=2* 2 * 2 * 2 * 3 = 48
What Is this number prime or composite?
A prime number has only two factors whereas a composite number has more than two factors
What characteristic composite numbers?
Composite numbers have more than two factors whereas prime numbers have only two factors.
Is nineties a prime or a composite?
Ninety-seven is a prime; the remainder of the nineties are composites.
479 is a prime number: its only factors are one and itself.
What are prime numbers ans composite numbers?
Prime numbers are numbers that only 1 and the number itself can be divided into (e.g, 3: no other number can divide into it) Composite numbers are numbers that more than 1 number besides itself and 1 can be divided into (e.g, 9: more than 1 number can divide into 9).
What numbers are composite number?
A composite number is a positive integer that has a positive divisor other than one or itself.
What is prime composite numbers?
When referring to positive integers, prime means having only two factors and composite means having more than two.
