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The Kempner function () of an arbitrary number is the maximum, over the prime powers dividing , of (). [4] When n {\displaystyle n} is itself a prime power p e {\displaystyle p^{e}} , its Kempner function may be found in polynomial time by sequentially scanning the multiples of p {\displaystyle p} until finding the first one whose factorial ...
A natural number is a sociable factorion if it is a periodic point for , where = for a positive integer, and forms a cycle of period . A factorion is a sociable factorion with k = 1 {\displaystyle k=1} , and a amicable factorion is a sociable factorion with k = 2 {\displaystyle k=2} .
The factorial number system is sometimes defined with the 0! place omitted because it is always zero (sequence A007623 in the OEIS). In this article, a factorial number representation will be flagged by a subscript "!". In addition, some examples will have digits delimited by a colon. For example, 3:4:1:0:1:0! stands for
Multiplicative partitions of factorials are expressions of values of the factorial function as products of powers of prime numbers. They have been studied by Paul Erdős and others. [1] [2] [3] The factorial of a positive integer is a product of decreasing integer factors, which can in turn be factored into prime numbers.
Its factorial number representation can be written as ()!. In the same way, a profinite integer can be uniquely represented in the factorial number system as an infinite string ( ⋯ c 3 c 2 c 1 ) ! {\displaystyle (\cdots c_{3}c_{2}c_{1})_{!}} , where each c i {\displaystyle c_{i}} is an integer satisfying 0 ≤ c i ≤ i {\displaystyle 0\leq c ...
The factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example, 5! = 5×4×3×2×1 = 120. By convention, the value of 0! is defined as 1. This classical factorial function appears prominently in many theorems in number theory. The following are a few of these theorems. [1]
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