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47 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) 47 is the largest known number, n, such that n and n + 1 are both Ulam numbers. [McCranie]
Submitted: 2003-03-05 21:27:00; Last Modified: 2008-01-30 11:28:00.
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