Substring primes: Difference between revisions
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(Against my better judgement, but I've had enough of this nonsense, and since some people are too weak-minded and lily-livered to do it themselves....) |
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;Task: |
;Task: |
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Find all primes in which all substrings (in base ten) are also primes. |
Find all primes in which all substrings (in base ten) are also primes. |
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This ''can'' be achieved by filtering all primes below 500 (there are 95 of them), but there ''are'' better ways. |
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