Sieve of Eratosthenes

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  • ASieve of Eratosthenes

    To find all of the prime numbers, start by crossing out out all that are multiplesof 2. Do the same for 3, 5, and so on, until the only numbers left are primes.

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    2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 2021 22 23 24 25 26 27 28 29 3031 32 33 34 35 36 37 38 39 4041 42 43 44 45 46 47 48 49 5051 52 53 54 55 56 57 58 59 6061 62 63 64 65 66 67 68 69 7071 72 73 74 75 76 77 78 79 8081 82 83 84 85 86 87 88 89 9091 92 93 94 95 96 97 98 99 100

    101 102 103 104 105 106 107 108 109 110111 112 113 114 115 116 117 118 119 120121 122 123 124 125 126 127 128 129 130131 132 133 134 135 136 137 138 139 140141 142 143 144 145 146 147 148 149 150151 152 153 154 155 156 157 158 159 160161 162 163 164 165 166 167 168 169 170171 172 173 174 175 176 177 178 179 180181 182 183 184 185 186 187 188 189 190191 192 193 194 195 196 197 198 199 200

  • ASieve of Eratosthenes

    To find all of the prime numbers, start by crossing out out all that are multiplesof 2. Do the same for 3, 5, and so on, until the only numbers left are primes.

    A N S W E R K E Y

    Copyright 2009 WorksheetWorks.com

    2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 2021 22 23 24 25 26 27 28 29 3031 32 33 34 35 36 37 38 39 4041 42 43 44 45 46 47 48 49 5051 52 53 54 55 56 57 58 59 6061 62 63 64 65 66 67 68 69 7071 72 73 74 75 76 77 78 79 8081 82 83 84 85 86 87 88 89 9091 92 93 94 95 96 97 98 99 100

    101 102 103 104 105 106 107 108 109 110111 112 113 114 115 116 117 118 119 120121 122 123 124 125 126 127 128 129 130131 132 133 134 135 136 137 138 139 140141 142 143 144 145 146 147 148 149 150151 152 153 154 155 156 157 158 159 160161 162 163 164 165 166 167 168 169 170171 172 173 174 175 176 177 178 179 180181 182 183 184 185 186 187 188 189 190191 192 193 194 195 196 197 198 199 200

    2 2 2 3 2

    2 2 3 2 2 2

    3 2 2 5 2 3 2 2

    2 3 2 5 2 2 3 2

    2 2 3 2 2 7 2

    3 2 2 5 2 3 2 2

    2 3 2 5 2 2 3 2

    2 2 3 2 7 2 2

    3 2 2 5 2 3 2 2

    7 2 3 2 5 2 2 3 2

    2 2 3 2 2 2

    3 2 2 5 2 3 2 7 2

    11 2 3 2 5 2 2 3 2

    2 7 2 3 2 2 2

    3 2 11 2 5 2 3 2 2

    2 3 2 5 2 2 3 2

    7 2 2 3 2 2 13 2

    3 2 2 5 2 3 2 2

    2 3 2 5 2 11 2 3 2

    2 2 3 2 2 2

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