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Single Curio View: (Seek other curios for this number) 3 is the smallest prime such that if F(p) = 2*p^21, then F(3), F(F(3)), and F(F(F(3))) are all primes. [Opao]
Submitted: 20031201 19:51:12; Last Modified: 20080130 11:28:00.
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