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Forum: Prime Cullen Prime 2007-06-18, 01:06
Replies: 7
Sticky: Welcome!
Views: 7,764
Posted By jasong
I'm going to expose my ignorance here. Because...

I'm going to expose my ignorance here. Because the numbers are of the form

k*2^n+1,

and k is prime, does this not increase the chance that a number has a small factor like 3 or 5? I mean,...
Forum: Prime Cullen Prime 2007-06-17, 00:18
Replies: 7
Sticky: Welcome!
Views: 7,764
Posted By jasong
[Off-topic] Can't you just picture someone,...

[Off-topic]
Can't you just picture someone, later on in the main effort, where they don't care if the exponent is prime or not but they're only testing composites because they're at a lower n-value...
Forum: Prime Cullen Prime 2007-05-05, 01:04
Replies: 7
Sticky: Welcome!
Views: 7,764
Posted By jasong
Just out of curiousity, how many Cullen primes...

Just out of curiousity, how many Cullen primes are known, and what are the chances that a prime Cullen prime hasn't been found because of simple dumb luck? In other words, if a number being searched...
Showing results 1 to 3 of 3

 
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