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Participate: 
4195 = 5 * 839 has a sum of prime factors (5 + 839 = 844)
that is equal to the sum of the distinct prime factors of
the two preceding numbers. 4194 = 2 * 3^2 * 233; 2 + 3 +
233 = 238; 4193 = 7 * 599; 7 + 599 = 606; 241 + 606 = 847;
238 + 606 = 844). [Post]
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