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Old 2020-09-22, 22:56   #987
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Nov 2016

251210 Posts

Conjecture: For integer triple (k,b,c), k>=1, b>=2, c != 0, gcd(k,c)=1, gcd(b,c)=1, there is a prime of the form (k*b^n+c)/gcd(k+c,b-1) with integer n>=1 if and only if (k*b^n+c)/gcd(k+c,b-1) has no covering set (including: covering set of fixed prime factors or covering set of all algebra factors or full covering set of partial algebra factors and partial fixed prime factors).

Last fiddled with by sweety439 on 2020-09-23 at 01:45
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