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What are prime number and composite numbers?
a prime number is a number that you can plus by one
Does x squared plus x plus 41 always equal a prime number?
No. it's not a prime number when x = 40, 41, 81,82 ...
Why is it when you multiply two prime numbers you get a number with three or four factors?
If the two prime numbers are different: You get the two prime numbers, plus 1, plus the product. For example, if you multiply 2 x 3 = 6, the factors of 6 are 2, 3, 1, and 6. If the two prime numbers are the same: You get the prime number, 1, and the product. For example 2 x 2 = 4. The factors of 4 are 2, 1, 4.
What is a number with exactly 13 factors?
4096 is the smallest one. Since the number of factors depends on the exponents of the prime factors, plus one, multiplied together, the set of numbers that meets the requirements are of the form: p12, where p is a prime number.
Is 4 plus 6 a prime number of 20?
NO!!!! Other than '2' all prime numbers are odd numbers. 4,6,10 & 20 are all even so they are not prime numbers.
