For an integer n>1, let P+ (n) be the largest prime factor of n. Following a celebrated conjecture of Erdős and Turán in the 1930s, Erdős and Pomerance proved in 1978 that lim infx→∞|n≤x: P+ (n+1) >P+ (n) |x>0. In this article, their result is extended to lim infx→∞|n≤x: P+ (n+1) >P+ (n), μ2 (n) =μ2 (n+1) =1|x>0.
Yu Zhang (Wed,) studied this question.
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