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The prime counting function is the function giving the number of primes less than or equal to a given number (Shanks 1993, p. 15). For example, there are no primes , so . There is a single prime (2) , so . There are two primes (2 and 3) , so . And so on.
The notation for the prime counting function is slightly unfortunate because it has nothing whatsoever to do with the constant . This notation was introduced by number theorist Edmund Landau in 1909 and has now become standard. In the words of Derbyshire (2004, p. 38), "I am sorry about this; it's not my fault. You'll just have to put up with it."
What else can I help you with?
What is the last prime number?
The is no last prime number - unless you are counting down, in which case, it is 2.
What counting number is nethier a prime or composite?
The number 1.
What counting number is not a prime nor composite number?
1
What is meant by there is at least one prime number between any counting number and its double?
Take any counting number greater than one. 2, 3, 4, 5 and so on. Double it. Between the number and twice the number, there will be at least one prime number. 3, a prime number, is in between 2 and 4.
Are there any number that are neither prime nor composite?
Yes. All prime numbers and composite numbers are positive integers, or whole counting numbers. That leaves infinitely many numbers that are neither prime nor composite. If you intended to narrow the scope of your question to the whole counting numbers or to the positive integers, then there are NO such numbers that are neither. A counting number, however large, will be either prime or composite.
What counting number is neither a prime number nor a composite number?
1 is the counting number that is neither a prime number nor a composite number.
What is the only counting number that is not prime nor composite?
ANSWER: 1 is the only counting number that is not prime nor composite.
Which counting number is not a prime number or a composite number?
None, everything is either prime or composite.
What is the last prime number?
The is no last prime number - unless you are counting down, in which case, it is 2.
The only counting number that is not prime or composite?
1.
Which counting number is neither a prime or composite number?
The number 1.
What counting number is nethier a prime or composite?
The number 1.
What counting number is not a prime nor composite number?
1
Is every number counting by 90 prime?
No. In fact, every number counting by 90, including 90 itself, is composite.
Any counting number greater than one that is not a prime number is what?
A composite number.
The numeral 1 is not a prime number what is it?
It is just an integer/real/counting number.
Is a counting number with exactly two different factors?
That's a prime number.
