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5 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) Fn = 2^(2^n) + 1 are semiprimes for n = 5, 6, 7, and 8. [De Geest and Honaker]
Submitted: 2004-01-04 13:39:07; Last Modified: 2008-01-31 23:27:31.
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