During the last several weeks there have been many messages about a Dubner factor database, finding factors of R(13860) (a repunit), primality proving of...
There are no prime numbers between 10^5028+24627 and 10^5028-23489 yielding a Gap of 48116 (or 48117). These type of numbers would seem to be good test cases ...
I have made some output changes to Gapper. 1. Gapper was not correctly saving redirected output if ^C was used to exit the program. The stdout was simply not...
I've just published article on search for Sierpinski numbers to 10^9 at : www.glasgow43.freeserve.co.uk/siernums.doc for those of you who are interested. Are...
As Phil indicated, it doesn't take much time or brain merely to *find* a PrP of the type that I guess Harvey has in mind to prove. It was as simple as ABC to...
Hi, Great news! I decided to test Jim's new GMP-ECM and found the following two factors of C233 within a couple hours of each other: Input number is 331...349...
I can send you a simple source code, in the old-fashioned TurboPascal 6.0, for Wheel factorization. It works with numbers less than 2^63 ~=9.233*10^18. For 32...
Hi, I need to show if a 32 bit integer is prime or not. Is it enough to prove that the number is greater than 2,odd number and divisible by 3? Or is there...
Hi all! Perhaps,i have found a new methode to generate primes. Here is the largest example,where i found it. We get (41)! primes for this equal px=41+(x^2-x) ...
Yes Normam, I imagine that Euler was quite happy when he discovered that. 41 is the biggest prime p such that n^2+n+p is prime for n in [0,p-2]. Amusingly, the...
I will be uploading a newer version of GMPECM shortly. This version contains these new things: 1. reads the entire file and converts all to GMP numbers. This...
This R(13860) challange has now a happy ending! I bow to all people who contributed to this in whatever way. Now I am in eager anticipation of what Harvey will...
Two integers are anti-coprime if they do not share a common anti-divisor. The Anti-divisor: http://www.users.globalnet.co.uk/~perry/maths Jon Perry ...
Hi all! I've got to the bottom of the problem, purely by accident, and now believe that I have fixed the inability to edit records in databases. As a trial,...
Hi all. I've noticed that the top level directory was in a bit of a state, so have created a few coherent subdirectories to put stuff under. I'd like to do a...
I have launched a site dedicated to the research of anti-divisors. http://www.users.globalnet.co.uk/~perry/maths Hope you all like it. Several people (Paul,...
A number is prime if two consecutive integers do not share at least two anti-divs. e.g. 15:2 6 10 16:3 11 17:2 3 5 7 11 Therefore 31 (15*2+1) is prime and...
Possible Goldbach proof by Kapoor. Evaluations/critiques needed for peer review. Enter www.vedicmaths.org then point to indexes. Click onto articles and then...
Hello, My name is Don Christmann and I am doing research on Prime Numbers and Composite gap distribution. I have recently made some observations that I would...
...for what you are doing for the search of everything that is associated to primes' matters in any respect. Hans PS: I'm sure you have *many* lovers of what...
I solicite colaboration to know if there is a value of A that makes T produce more than 19 primes (not consecutive but successive) when A being greater than...
