
The numbers which cannot be factored in are called prime numbers. Prime numbers have two factors only, one and the number itself. This means that prime numbers are divisible only by one and the number itself.
Primality is the property of being prime. One can check the primality of a number by trial division test. Start with the smallest number and then increase the number to do the trial division test. One can also find the divisibility of a number by simple rules of divisibility. Prime numbers have wide applicability in various fields of science and technology. Prime numbers are used in abstract algebra, Eisenstein’s criterion, computing for checksums, hash tables, pseudorandom number generators, knot theory, quantum mechanics, evolutionary biology, arts, and literature.
Consider an example, 34866. Its factors are 2 x 3 x 3 x 13 x 149. All these numbers are prime numbers. Hence, these are called prime factors.
| 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 |
The numbers having more than two factors are called composite numbers. Composite numbers must have factors other than one and the number itself. They are also known as non-prime numbers.
| 4 | 6 | 8 | 9 | 10 | 12 | 14 | 15 | 16 | 18 |
| 20 | 21 | 22 | 24 | 25 | 26 | 27 | 28 | 30 | 32 |
| 33 | 34 | 35 | 36 | 38 | 39 | 40 | 42 | 44 | 45 |
| 46 | 49 | 50 | 51 | 52 | 54 | 55 | 56 | 57 | 58 |
| 60 | 62 | 63 | 64 | 65 | 66 | 68 | 69 | 70 | 72 |
| 74 | 75 | 76 | 77 | 78 | 80 | 81 | 82 | 85 | 86 |
| 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 |
| 98 | 99 | 100 |
It states that every number greater than 1 can be written as a product of two or more prime numbers.
JEE Main marks vs rank vs percentile
JEE Advanced Eligibility Criteria
JEE Advanced Chemistry Syllabus
JEE Advanced Registration Dates
Derivation Of Lens Maker Formula
Unit Of Pressure Velocity Uses of Plane Mirror
Wave Theory of Light
Unit of Density Unit of Light Unit of Force Unit of Magnetic Field Unit of wavelength Unit of Viscosity Uses of Electroplating Young's Modulus
What is the Scattering of Light
Lenz Law Space Wave Propagation Schrodinger Wave Equation Relation between Fahrenheit and Celsius Refractive Index Potentiometer Working Pascal Law Oscillatory Motion Optical Instruments Newton's Laws of Motion - First Law Modulation and Demodulation Magnetic Flux Lens Formula and Magnification Kaleidoscope Faradays Law Epsilon Naught Value Energy Bands Electrostatics Electroscope AC Generator Unit of Current Lithosphere Bending Equation Derivation Difference Between Pound and Kilogram Semiconductor Devices OTEC - Ocean Thermal Energy Conversion Hall Effect Rectilinear Propagation of Light Difference Between Ammeter and Voltmeter Coefficient of Linear Expansion Ampere’s Law Cyclone and Thunderstorm Save The Environment From Pollution Particle Nature of Light Types of DC Motor Uses Of Transistor Derivation of Phase Rule Unit of Humidity