x******g
发帖数: 318 | 1 a,b为两个互质的正整数,a>1
问
数列An=a^n+b是否一定有无数个质数? | B****n
发帖数: 11290 | 2 you can have infinity counterexamples
like a=4 b=5
consider mode 3
【在 x******g 的大作中提到】
: a,b为两个互质的正整数,a>1
: 问
: 数列An=a^n+b是否一定有无数个质数?
| x******g
发帖数: 318 | 3 恩，看来这个问题不好..
【在 B****n 的大作中提到】
: you can have infinity counterexamples
: like a=4 b=5
: consider mode 3
| t*******e
发帖数: 20 | 4 Positive, if (a,b)=1 then an+b has infinitely many primes! | e*******y
发帖数: 73 | 5 On the other hand, are there infinty many prims in {n^2+1}? it is a big open
problem! |
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