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329 (another Prime Pages' Curiosity) |
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329 is the smallest odd composite number m such that
m plus sum of the 3^j-th power of the digits of m for j=1,2 & 3, are primes: i.e., 329 + 3^3^1 + 2^3^1 + 9^3^1, 329 + 3^3^2 + 2^3^2 + 9^3^2 & 329 + 3^3^3 + 2^3^3 + 9^3^3 are primes. [Firoozbakht]
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