645: Difference between revisions
(Created page with "{{particular natural number}} ==Summary== ===Factorization=== The number 645 is a square-free number with prime factors 3, [5]], and 43: <math>\! 645 = 3 * 5 *...") |
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===Factorization=== | ===Factorization=== | ||
The number 645 is a [[square-free number]] with prime factors [[3]], [5]], and [[43]]: | The number 645 is a [[square-free number]] with prime factors [[3]], [[5]], and [[43]]: | ||
<math>\! 645 = 3 * 5 * 43</math> | <math>\! 645 = 3 * 5 * 43</math> | ||
Latest revision as of 21:04, 3 January 2012
This article is about a particular natural number.|View all articles on particular natural numbers
Summary
Factorization
The number 645 is a square-free number with prime factors 3, 5, and 43:
Properties and families
| Property or family | Parameter values | First few numbers satisfying the property | Proof of satisfaction/containment/membership |
|---|---|---|---|
| Poulet number (also called Sarrus number) (Fermat pseudoprime to base 2) | third Poulet number | 341, 561, 645, 1105, 1387, 1729, 1905, 2047, [SHOW MORE] View list on OEIS | , and 28 divides 644, so . |
