28 Feb
2003
28 Feb
'03
4:21 a.m.
I wrote: << For any prime p consider the mapping f_p : N -> N given by f_p(n) = p*n + 1. Consider (possibly finite) sequences of primes (*) q_0, q_1, q_2, ..., where q_(n+1) = f_p(q_n) for n = 0,1,2,...
Another question: If there are no infinite sequences (*) composed purely of primes, do there exist sequences (*) that *contain* infinitely many primes? If so, how large can the density of the primes be in (*) ??? --Dan A.