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Erdős problem 1074

Similarly, if PP is the set of all primes pp such that there exists an mm with p≢1(modm)p\not\equiv 1\pmod{m} such that m!+10(modp)m! + 1 \equiv 0\pmod{p}, then does limP[1,x]π(x) \lim\frac{|P\cap[1, x]|}{\pi(x)} exist?

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FormalConjectures/ErdosProblems/

1074.lean

Retained formal statement7 of 12

Regarding the first question, Hardy and Subbarao computed all EHS numbers up to 2102^{10}, and write "...if this trend conditions we expect [the limit] to be around 0.5, if it exists."

FormalConjectures/ErdosProblems/1074.leanErdos1074.erdos_1074.variants.EHSNumbers_one_half1 lineExact file
Erdos1074.EHSNumbers.HasDensity (1 / 2)
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