On the density of odd integers of the form (p − 1)2−n and related questions |
| |
Authors: | P Erdös AM Odlyzko |
| |
Institution: | Mathematical Institute of the Hungarian Academy of Sciences 1053 Budapest, Reáltanoda utca 13-15, Hungary;Bell Laboratories, Murray Hill, New Jersey 07974 USA |
| |
Abstract: | It is shown that odd integers k such that k · 2n + 1 is prime for some positive integer n have a positive lower density. More generally, for any primes p1, …, pr, the integers k such that k is relatively prime to each of p1,…, pr, and such that k · p1n1p2n2 … prnr + 1 is prime for some n1,…, nr, also have a positive lower density. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|