Primes, factors, & perfect numbers

For a companion activity, see Eratosthenesâ€™ Sieve www.keypress.com/documents/ALookInside/MathExplorer/MathExplorer_p p_46_54.pdfActivity 3: Identify prime numbers, composite numbers, and factors of composite ... to the sum of its proper divisors.- 61 5 *13 = 65 odd numbers inbetween 63 and 65 that are Prime 0 23 * 3 = 69 odd numbers inbetween 65 and 69 that are Prime 67 5 * 15 = 75 odd numbers inbetween 69 and 75 that are Prime 71, 73 7 * 11 = 77 odd numbers inbetween 75 and 77 that are Prime 0 9 ...
- In "Elements," Euclid solves the problem of how to create a perfect number, which is a positive integer equal to the sum of its positive divisors, using Mersenne primes. A Mersenne prime is a prime number that ... of factoring large composite numbers ...
c++ Prime/composite number & prime factorization

then tells the user if that number is prime or composite, if composite it must display all of the composite numbers prime factors. Someone please take a look at it! #include <iostream> using namespace std; #ifndef __TRUE_FALSE__ #define __TRUE_FALSE__ # ...- Now, a group of researchers at UC Santa Barbara has designed and fabricated a quantum processor capable of factoring a composite number -- in this case the number 15 -- into its constituent prime factors, 3 and 5. Although modest compared to a 600-digit ...

- Is 17 a prime or composite number and does it have any factors?
- What is the prime factorization of 61?
- Are the numbers 87, 57, 71, 47, 29, 61 and 91 prime or composite?
- What is a composite number expressed as the product of factors that are prime numbers?
- Is the number 1 prime or composite?
- Are 54 243 12 18 28 61 29 23 120 114 prime number, composite, or neither?
- What to prime number equal 61?
- What is the next prime number after 61?

- Is 61 a prime number? - Yahooyup its a prime number coz it ... it is prime . 0. 0. Comment ... there are two numbers in the table that ends in one and is a composite 21 and 81. the ...
- Is 61 a prime or composite number - Answers.comIs 61 composite or prime number? A prime number is a number with two and only two factors: 1 (also known as unity) and itself. A composite number is a number with ...
- Which of the following is a composite number?Which of the following is a composite number ... a composite number. 13, 61, and 31 are prime ... its a number which has at least 3 factors ...
- Factoring - Factors and multiples - In Depth47,53,59,61,67,71,73,79,83,89,97. A composite number is any number that has more than two factors. Here's a list of composite ... prime factors of a number, ...
- Composite number - Wikipedia, the free encyclopediaA composite number is a positive integer that has at least one positive divisor other than one or the number itself. In other words, a composite number is any ...