Mersenne: Illegal Sumouts

2000-06-29 Thread Jim Howell 



I had a similar problem that started when I 
upgraded from my old (Netcom) "NetComplete" software to the Mindspring software, 
except that the Illegal Sumout occurred (nearly) 100% of the time.  I use 
the same work-around you do, namely to stop Prime95 before starting the 
Mindspring software.  On my system, I sometimes get a small white box, 
about 1/8-inch square, at the upper left corner of my screen at about the same 
time as the Sumout.  When I position the mouse over the Connect button and 
leave it there for a few seconds, an explanatory "box" appears near the mouse 
pointer.  When the box disappears, the white box in the corner of my screen 
appears.  I don't remember now whether the Illegal sumout occurs at this 
same time, or if it occurs during dial-up.  Perhaps the problem is with the 
Mindspring software?
 
-- Original message follows 

 
Date: Mon, 26 Jun 2000 19:49:30 -0400From: 
"Allan G. Schrum/Theresa C. Schrum" <[EMAIL PROTECTED]>Subject: 
Mersenne: Modem Dun causing Illegal Sumouts?Hi Folks,I recently 
upgraded my Win98 HP PIII 533 machine to useMicrosoft's DUN with the 128 bit 
encryption (the latestavailable from Microsoft). Now, fairly reliably, 
whenever Istart the modem to make a connection to my ISP, I get 
anIllegal Sumout error on prime95. If I stop prime95, start mymodem, 
then continue, everything works fine. But 1 out of 3times, if I let prime95 
run while starting my modem, I getthe sumout error.Has anyone else 
had this problem? Anyone have any links withMicrosoft to research/report 
this problem?Thanks,- -Allan

Mersenne: Factoring

2000-06-16 Thread Jim Howell 



[Wed 14 Jun 2000, Paul Leyland writes]
Today I found this number 
3756482676803749223044867243823 with ECM andB1=10,000.  It has two 
factors, each of 16 digits, which could *not* havebeen 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:
 
http://www.utm.edu/research/primes
 
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