Prime Numbers Archives - The Nature of Mathematics

Individual Research Projects Section 5.2

September 29, 2015July 8, 2015 by elaine

Project 5.1

In the text we tried some formulas that might have generated only primes, but, alas, they failed. Below are some other formulas. Show that these, too, do not generate only primes.
a. n² + n + 41… See the whole entry

Video Links 5-2

August 11, 2015July 8, 2015 by elaine

Videos:
Sieve of Eratosthenes (time: 2:55)

Prime Numbers (time: 1:42)

Largest Prime (time: 1:14)
… See the whole entry

Reference Topics 5-2

June 9, 2016July 8, 2015 by elaine

This is a very useful site. You enter any positive integer and it will return a prime factorization of that integer.
http://www.rsok.com/~jrm/factor.html

The Prime Pages; there is a lot here. Articles include the “Guinness book of” prime number records, how … See the whole entry

Section 5.2: Prime Numbers

September 24, 2015July 7, 2015 by elaine

5.2 Outline

Divisibility
1. definition
  1. divisor
  2. factor
  3. divides
  4. multiple
2. number of divisors
  1. divisibility rule for 2
  2. divisibility rule for 3
  3. rules of divisibility for 1-12
3. finding primes
  1. definitions
    1. prime number
    2. composite number
  2. sieve of Eratosthenes
4. prime factorization
  1. factoring
  2. prime factorization
  3. fundamental

… See the whole entry