period of a prime
Let p be a prime. The period of the decimal expansion of 1/p is often called the period of p. This period always divides p-1 and usually found by calculating the order of 10 modulo p (which equals the period). If the period equals p-1, then it is a full period prime.
p | period | p | period | p | period | p | period | p | period | p | period |
---|---|---|---|---|---|---|---|---|---|---|---|
2 | * | 3 | 1 | 5 | * | 7 | 6 | 11 | 2 | 13 | 6 |
17 | 16 | 19 | 18 | 23 | 22 | 29 | 28 | 31 | 15 | 37 | 3 |
41 | 5 | 43 | 21 | 47 | 46 | 53 | 13 | 59 | 58 | 61 | 60 |
67 | 33 | 71 | 35 | 73 | 8 | 79 | 13 | 83 | 41 | 89 | 44 |
97 | 96 | 101 | 4 | 103 | 34 | 107 | 53 | 109 | 108 | 113 | 112 |
127 | 42 | 131 | 130 | 137 | 8 | 139 | 46 | 149 | 148 | 151 | 75 |
157 | 78 | 163 | 81 | 167 | 166 | 173 | 43 | 179 | 178 | 181 | 180 |
191 | 95 | 193 | 192 | 197 | 98 | 199 | 99 | 211 | 30 | 223 | 222 |
227 | 113 | 229 | 228 | 233 | 232 | 239 | 7 | 241 | 30 | 251 | 50 |
257 | 256 | 263 | 262 | 269 | 268 | 271 | 5 | 277 | 69 | 281 | 28 |
See Also: UniquePrime
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