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71 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) The largest known natural number n such that 2n does not contain the prime digit 5. It is also the case for the prime digit 7. [Capelle]
Submitted: 2009-07-15 05:42:30; Last Modified: 2009-08-21 05:57:36.
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