[Wed 14 Jun 2000, Paul Leyland writes]
Today I found this number 3756482676803749223044867243823 with ECM and B1=10,000. It has two factors, each of 16 digits, which could *not* have been found by trial division in any reasonable time. -------------
I use a program called "factor.exe", which uses
several factoring methods. It factors the above number within several
seconds. (For this number, the factors are found with the P-1
method.) In case anyone is interested, the factors are
1483398061194277 and 2532349728015299.
This program runs on Windows, and can be downloaded
from Chris Caldwell's main page, at:
Go down to section 4, (Software), and look for
"factor.exe", described as a DOS program, but it actually runs in a Command
Window on Windows 95 and later, and (probably) not under actual DOS. I
find "factor.exe" quite useful for factoring small numbers (it will accept
numbers up to about 130 digits).
--Jim
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