Composite Numbers

A prime number, such as 3, has only two factors, one and the number itself. A composite number has more than two factors, for example 27, because it has 1, 3, 9, and 27 as factors.

There is no prime composite number; an integer greater than 2 can be either prime or composite, but not both.

Nor can you list all the prime number and all the composite numbers: you have infinite sets in both cases.

3665, excluding 25 and 100.

No, it is not. First refers to the order in which something finished or is done, while one refers to a numerical volume or amount.

100 102 104 105 106 108 110 111 112 114 115 116 117 118 119 120 121 122 123 124 125 126 128 129 130 132 133 134 135 136 138 140 141 142 143 144 145 146 147 148 150 152 153 154 155 156 158 159 160 161 162 164 165 166 168 169 170 171 172 174 175 176 177 178 180 182 183 184 185 186 187 188 189 190 192 194 195 196 198 200 201 202 203 204 205 206 207 208 209 210 212 213 214 215 216 217 218 219 220 221 222 224 225 226 228 230 231 232 234 235 236 237 238 240 242 243 244 245 246 247 248 249 250 252 253 254 256 258 259 260 261 262 264 265 266 267 268 270 272 273 274 275 276 278 279 280 282 284 285 286 287 288 289 290 291 292 294 295 296 297 298 299 300

4, 6, 8, 9, 12, 18, 24, 36, 72 are composite.

2 and 3 are prime.

1 is neither.

A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 2123 is composite.

It is composite.

66, 90, & 115

Reduce each number to its prime factors.

Hence

66 = 11,3,2

90 = 18,6 = 3,6,6 = 3,3,3,2,2

115 = 5,23

The HCF between 66, & 90 is 3,2 = 6

There is no common factor between 115 and 66,90.

13636131 has factors other than 1 and itself, so it is not a prime number. It is divisible by 3. (You can check this by adding the digits of the number: 1 + 3 + 6 + 3 + 6 + 1 + 3 + 1 = 24. If the sum of the digits is divisible by 3, the number itself is also divisible by 3.) Therefore, it is a composite number.

1115 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 have a different name.

YES. 4565282 is a composite number because it is even and for sure it has other factors aside from 1 and itself which is 2.

Prime numbers are numbers which can only be divided by 2 numbers: 1 and themselves.

Composite numbers are all others: numbers which can be divisible by any integer from 2-(n/2) where n is your given number.<ref>We say (n/2) because the lowest prime to divide is 2, thus the highest is n/2</ref>

Now with definitions aside, let's analyze the number 3305. Is there any number which is clearly divisible? There is!

Note that when a number is multiplied by 5, it will yield a number which ends in a 5 or 0. In fact, multiples of 5 equals all numbers ending with 0 or 5. Thus, 3305 must be divisible by 5.

You can check it, though it's unnecessary: 3305 / 5 = 661

319 is a prime number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

Gosh, another high number! (I've answered a question that's similar to this.) Anyway, I'm not sure about this number, so please pardon me if Ik'm wrong, but based on my prior knowledge and half an hour of solving, 8347 might be a prime number.

33 = 3 x 11, thus it's not a prime number

56 is not a prime number as it is divisible by 2. The only even prime number is 2.

And its not divisible by 3, except with a remainder.

The concept of prime or composite is relevant only for integers larger than 1, so it is neither.

Composite. All even numbers greater than 2 are composite.

22 is a composite number because it can be produced from the product of 2 times by 11.Prime numbers are ones that are the product of themselves times by one alone example 3 is a prime cos' it is 3 times 1 only this alone.
It's a composite number. It cannot be prime because it is divisible by two.

693 can be divided by 3 ==> composite number.

This is an easy prime because if you make a sum of all the digits: 6 + 9 + 3 = 18, if you can devide this sum by 3 than you can also divide the original number by 3.

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 48 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 84 85 86 87 88 90 91 92 93 94 95 96 98 99 100 102 104 105 106 108 110 111 112 114 115 116 117 118 119 120 121 122 123 124 125 126 128 129 130 132 133 134 135 136 138 140 141 142 143 144 145 146 147 148 150 152 153 154 155 156 158 159 160 161 162 164 165 166 168 169 170 171 172 174 175 176 177 178 180 182 183 184 185 186 187 188 189 190 192 194 195 196 198 200 201 202 203 204 205 206 207 208 209 210 212 213 214 215 216 217 218 219 220 221 222 224 225 226 228 230 231 232 234 235 236 237 238 240 242 243 244 245 246 247 248 249 250 252 253 254 256 258 259 260 261 262 264 265 266 267 268 270 272 273 274 275 276 278 279 280 282 284 285 286 287 288 289 290 291 292 294 295 296 297 298 299 300

12, 49, and 99 are composite, the rest are prime.

When referring to positive integers, prime means having only two factors and composite means having more than two.

39 = 3 x 13

2 17 31 are prime