The book is now available! 1921
(another Prime Pages' Curiosity)
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Participate: 		+ The first year in which seventeen counties competed for the County Championship (cricket). 17 is the smallest prime factor of 1921!

+ 1921 = 17 * 113 has a sum of prime factors (130 = 17 + 113) that is equal to the sum of the unique prime factors of the two preceding numbers (1919 = 19 * 101; 1920 = 2^7 * 3 * 5; 130 = 19 + 101 + 2 + 3 + 5). [Post]

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