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Erdős problem 371

Let P(n)P(n) denote the largest prime factor of nn. Show that the set of nn with P(n+1)>P(n)P(n+1) > P(n) has density 12\frac{1}{2}.

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FormalConjectures/ErdosProblems/

371.lean

Retained formal statement1 of 1

Let P(n)P(n) denote the largest prime factor of nn. Show that the set of nn with P(n+1)>P(n)P(n+1) > P(n) has density 12\frac{1}{2}.

FormalConjectures/ErdosProblems/371.leanErdos371.erdos_3711 lineExact file
{n | (n + 1).maxPrimeFac > n.maxPrimeFac}.HasDensity (1 / 2)
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