Re: primes

Rod" <RodRodRodRod@xxxxxxxxxxx> writes:
What's the largest number for which it is known that there are no unknown primes less then it.

Phil Carmody wrote:

Impossible to answer. What does "knowing" a prime >>consist of?

If generating it once within a computer, maybe using >>it briefly and then throwing it away is enough, then >>it's probably somewhere around 10^18.

it's probably somewhere around

2*10^18+3

2k+3 is prime number
if and only if
k isn't belong to matrix
3
6,11
9,16,23
12,21,30,39
============

when k=10^18

Regards,
Vincenzo Librandi
.