Primes, factors, & perfect numbers
For a companion activity, see Eratosthenes’ 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.
More Prime Numbers
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 ...
What is a Prime Number?
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__ # ...
Composite Number Factoring
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 ...