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731 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) The largest composite number such that deleting any digit(s) will never yield another composite number, i.e. only yields primes or 1. [Hasler]
Submitted: 2008-03-29 18:29:01; Last Modified: 2008-04-27 13:22:41.
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