Concepts of prime numbers and composite numbers

the explanation of complex numbers (1) is reasonable. "A Brief Training of Huainanzi Soldiers": "The hair must be interpreted in the middle, the words must be combined, the movement must be timely, and the solution must be beaten." Liu Xie, Liang of the Southern Dynasties, wrote "Literary Mind and Carving Dragons: Style": "Although the eight styles are different, they will combine numbers, and if they are in the ring, they will converge." (2). Mathematical terms. A number in a natural number that is divisible by other numbers except 1 and this number. For example, 6 can be divisible by 1 and 6, or by 2 and 3. Xu Chi's Goldbach Conjecture III: "The teacher said that you all know even numbers and odd numbers, as well as prime numbers and composite numbers." The explanation of word decomposition and combination is closed. Hug. A perfect match. The appearance is close to the spirit. Gathering: resultant force. Jointly organized. Joint stock Joint venture. No violation, one thing corresponds to or conforms to another: qualified. Legal. Be in love with each other. It should be: it should be. Together. "Articles are combined with times, and poems are combined with times." An explanatory number (number) representing, dividing, or calculating a quantity: a number. Quantity. Numerals. Number theory (a branch of mathematics that mainly studies the properties of positive integers and the laws related to them). Numerical control. A few, a few: several people. Days. Skills, academic: "The number of games played today is decimal." Fate, heaven