Perhaps the purest type of mathematics is number theory, which focuses on the properties of positive integers. It might appear to be far too abstract to be applicable to the natural world at first glance. Truth be told, the persuasive American number scholar Leonard Dickson expressed, "Say thanks to God that the number hypothesis is stainless by any application." But, over and over, the number hypothesis tracks down surprising applications in science and design, from leaf points that (nearly) all around follow the Fibonacci succession to present-day encryption procedures in light of figuring indivisible numbers. Presently, specialists have shown a