A prime number is a natural number of 2 or more that does not have a positive divisor other than 1 and the number itself. For example, 2, 3, 5, 7, etc. correspond to prime numbers.<\/p>\n\n\n\n
Definition of prime numbers<\/p>\n\n\n\n
A prime number is a natural number with only two positive divisors, “1 and its number itself”. A natural number of 2 or more that is not a prime number is called a composite number.<\/p>\n\n\n\n
Example of prime numbers<\/p>\n\n\n\n
Specific prime numbers include the following.<\/p>\n\n\n\n
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<\/p>\n\n\n\n
The reason why 1 is not a prime number<\/p>\n\n\n\n
1 is not included in prime numbers because there is only one positive dicidant. Because the definition of a prime number is “a natural number with two positive dicisors”.<\/p>\n\n\n\n
How to distinguish prime numbers<\/p>\n\n\n\n
To determine whether a number is a prime number, there is a way to divide the number by a small number.<\/p>\n\n\n\n
Check if they can be divisible by 2: All even numbers other than 2 are not prime numbers because they are divisible by 2.<\/p>\n\n\n\n
Check if it is divisible by 3: If the sum of each digit is divisible by 3, the number is not a prime number because it is divisible by 3.<\/p>\n\n\n\n
Check if it can be divisible by 5: A number with a digit of 0 or 5 is not a prime number because it can be divisible by 5.<\/p>\n\n\n\n
Trial division: Divide in order by prime numbers from 2 to the square root of that number, and find out if there is a number that can be divided. If there is no divisible number, it is a prime number.<\/p>\n\n\n\n
Properties of prime numbers<\/p>\n\n\n\n
The smallest prime number is 2.<\/p>\n\n\n\n
It was proven by Euclid about the 3rd century BC that prime numbers exist infinity.<\/p>\n\n\n\n
The distribution of prime numbers is related to important problems in modern mathematics.<\/p>\n\n\n\n
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A prime number is a natural number of 2 or more that does not have a positive divisor other than 1 and the num […]<\/p>\n","protected":false},"author":16,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[12,16,13],"tags":[],"class_list":["post-209565","post","type-post","status-publish","format-standard","hentry","category-column","category-hitokoto","category-fortune"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/uranaiyakata.com\/shinjuku\/wp-json\/wp\/v2\/posts\/209565","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/uranaiyakata.com\/shinjuku\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/uranaiyakata.com\/shinjuku\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/uranaiyakata.com\/shinjuku\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/uranaiyakata.com\/shinjuku\/wp-json\/wp\/v2\/comments?post=209565"}],"version-history":[{"count":2,"href":"https:\/\/uranaiyakata.com\/shinjuku\/wp-json\/wp\/v2\/posts\/209565\/revisions"}],"predecessor-version":[{"id":209568,"href":"https:\/\/uranaiyakata.com\/shinjuku\/wp-json\/wp\/v2\/posts\/209565\/revisions\/209568"}],"wp:attachment":[{"href":"https:\/\/uranaiyakata.com\/shinjuku\/wp-json\/wp\/v2\/media?parent=209565"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/uranaiyakata.com\/shinjuku\/wp-json\/wp\/v2\/categories?post=209565"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/uranaiyakata.com\/shinjuku\/wp-json\/wp\/v2\/tags?post=209565"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}