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Excepted number of primes of the form (k*b^n+c)/gcd(k+c,b-1) for n <= given number
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2020-11-25, 14:09
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sweety439
Nov 2016
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the page only writes "trivial density O(ln(N))", however, I know that the density is different by triple (k,b,c), e.g. 29*2^n-1 has much low density as 17*2^n-1
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