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78557 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) The smallest positive odd integer k such that both k * 2n + 1 and k + 2n are composite for any positive integer n.
Submitted: 1999-09-06 16:52:27; Last Modified: 2008-12-25 12:08:52.
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