Thanks for the factor.exe citation.
At 01:40 AM 6/16/00 -0700, Jim Howell wrote:
>[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:
>
>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
>
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><DIV><FONT face=Arial size=2>[Wed 14 Jun 2000, Paul Leyland
writes]</FONT></DIV>
><DIV><FONT face=Arial size=2><BR>Today I found this number
>3756482676803749223044867243823 with ECM and<BR>B1=10,000. It has two
>factors, each of 16 digits, which could *not* have<BR>been found by trial
>division in any reasonable time.</FONT></DIV>
><DIV><FONT face=Arial size=2></FONT> </DIV>
><DIV><FONT face=Arial size=2>-------------</FONT></DIV>
><DIV><FONT face=Arial size=2></FONT> </DIV>
><DIV><FONT face=Arial size=2>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.<BR></FONT></DIV>
><DIV><FONT face=Arial size=2>This program runs on Windows, and can be
downloaded
>from Chris Caldwell's main page, at:</FONT></DIV>
><DIV><FONT face=Arial size=2></FONT> </DIV>
><DIV><FONT face=Arial size=2><A
>href="http://www.utm.edu/research/primes">http://www.utm.edu/research/prime
s</A></FONT></DIV>
><DIV><FONT face=Arial size=2></FONT> </DIV>
><DIV><FONT face=Arial size=2>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).</FONT></DIV>
><DIV><FONT face=Arial size=2>--Jim</FONT></DIV>
><DIV><FONT face=Arial size=2> </DIV></FONT></BODY></HTML>
>
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