Find prime n such that reversed n is also prime: Difference between revisions
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m (Peak moved page Find prime n for that reversed n is also prime to Find prime n such that reversed n is also prime: English grammar) |
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=={{header|jq}}== |
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{{works with|jq}} |
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'''Works with gojq, the Go implementation of jq''' |
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Using the definition of is_prime at [[Erd%C5%91s-primes#jq]]: |
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<lang jq># generate a stream of the reversible primes |
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def reversible_primes: |
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def r: tostring|explode|reverse|implode|tonumber; |
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(if . == null then infinite else . end) as $n |
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| 2, (range(3; $n; 2) | select(is_prime and (r|is_prime))); |
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"Primes under 500 which are also primes when the digits are reversed:", |
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(500 | reversible_primes)</lang> |
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{{out}} |
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<pre> |
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Primes under 500 which are also primes when the digits are reversed: |
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2 |
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3 |
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5 |
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7 |
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11 |
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13 |
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17 |
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31 |
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37 |
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71 |
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73 |
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79 |
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97 |
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101 |
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107 |
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113 |
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131 |
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149 |
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151 |
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157 |
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167 |
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179 |
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181 |
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191 |
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199 |
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311 |
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313 |
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337 |
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347 |
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353 |
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359 |
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373 |
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383 |
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389 |
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</pre> |
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=={{header|Julia}}== |
=={{header|Julia}}== |
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<lang julia>using Primes |
<lang julia>using Primes |