![]() Prime numbers also show up in a variety of surprising contexts, including physics, music, and even in the arrival of cicadas! Because of this, when a website sends and receives information securely-something especially important for financial or medical websites, for example-you can bet there are prime numbers behind the scenes. However, it can be extremely difficult to factor a number. With the help of a computer, it is easy to multiply two prime numbers. When will I use this? One notable example is with cryptography, or the study of creating and deciphering codes. ![]() ![]() It's the age-old question that math teachers everywhere must contend with. Key standard: Determine whether a given number is prime or composite, and find all factors for a whole number.The number 1 only has one factor and usually isn't considered either prime or composite. Counting numbers which have more than two factors (such as 6, whose factors are 1, 2, 3, and 6), are said to be composite numbers. They form the basic building blocks for all integers.Ī prime number is a counting number that only has two factors, itself and one. Prime numbers, a concept introduced to most students in Grades 4 and up, are fundamental to number theory. ![]() Number theory, or the study of integers (the counting numbers 1, 2, 3., their opposites –1, –2, –3., and 0), has fascinated mathematicians for years. The Center for Model Schools (formerly ICLE)Ĭustomer Service & Technical Support Portal Into Algebra 1, Geometry, Algebra 2, 8-12 Science & Engineering Leveled Readers, K-5 ![]()
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