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72 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) 72 is the only number of the form pq * qp that lies between a twin prime pair, where p and q are distinct primes. [Kulsha]
Submitted: 2000-10-28 10:48:41; Last Modified: 2009-04-20 18:37:58.
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