In this mathematics article, we will explore the question, "Is 7979 a prime number?" by examining the definition of prime numbers, methods for testing primality, and applying those methods to the number 7979. Definition of Prime Numbers Prime numbers are positive integers greater than 11 that ...
Which number is a prime number? A. 4 B. 6 C. 7 D. 9 相关知识点: 试题来源: 解析 C。本题考查质数的概念。质数是指在大于 1 的自然数中,除了 1 和它自身外,不能被其他自然数整除的数。4 可以被 2 整除,6 可以被 2 和 3 整除,9 可以被 3 整除,只有 7 除了 1 和它自身外,不能...
百度试题 结果1 题目What is not a prime number? A. 13 B. 17 C. 21 D. 23 相关知识点: 试题来源: 解析 C。本题考查质数的概念。21 可以分解为 3×7,所以它不是质数。13、17、23 都只能被 1 和自身整除,是质数。反馈 收藏
Why is 1 not a prime number? 1 is not a prime number because it has only one factor, namely 1. Prime numbers need to have exactly two factors. Why is 2 a prime number? 2 is a prime number because its only factors are 1 and itself. Is 51 a prime number? 51 is not a prime ...
• A prime number is any positive number that can only be divided by itself and the number 1. • There are 25 prime numbers up to 100: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97. • The opposite of...
Prime numbers must be greater than one. Another way of saying this is that the only factors of a prime number are 1 and the number itself. What is a composite number? Acomposite numberis a positive whole number that can be made by multiplying twosmallerpositive whole numbers. ...
The number of differentprime numbers that divide 81 is( ). A. 1 B. 2 C. 3 D. 4. 相关知识点: 试题来源: 解析 A. 题目翻译: 81的不同质因数有多少个? 把81分解质因数,81=3×3×3×3,只有质因数3.所以选A,一个质因数.. 反馈 收藏 ...
百度试题 结果1 题目7 is a prime number. ( ) 相关知识点: 试题来源: 解析 正确 反馈 收藏
Prime numbers are any numbers that cannot be evenly divided by any integer other than 1 and itself. Or in other words, the only numbers that you can multiply to get a prime number are 1 and the prime number. Numbers that are not prime, or those with additional factors other than 1 and...
Neither 0 or 1 is a prime number. Nor are they composite numbers. Because prime and composite numbers are only defined for integers that are larger than 1.