Fermat numbers factorization - Page 2

Andi47 · 2008-01-28, 17:49

@Luigi: Did you get my email yesterday? I want to reserve n=32 from k=30e12 to 35e12 (from the "most wanted" list).

ET_ · 2008-01-28, 17:56

Quote:

Originally Posted by Andi47

@Luigi: Did you get my email yesterday? I want to reserve n=32 from k=30e12 to 35e12 (from the "most wanted" list).

I did, and in process to addyour reservation. I was sick yesterday, sorry

Luigi

Andi47 · 2008-01-28, 18:02

Quote:

Originally Posted by ET_

I was sick yesterday, sorry

Luigi

Sorry, I did not know. I hope you are well again.

geoff · 2008-01-30, 05:22

I am interested in finding more factors for Generalised Fermat Numbers, particularly those of the form b^(2^n)+1 where b>2 is small and even.

http://www1.uni-hamburg.de/RRZ/W.Keller/GFNsmall.html

A few questions I am trying to answer are:

What trial factoring, P-1, ECM work has been done already?

Is there any suitable trial factoring software for Linux, optimised for x86-64?

geoff · 2008-03-12, 21:24

I ended up writing my own program (for x86-64 Linux) to find small factors of generalised Fermat numbers a^(2^m) + b^(2^m). http://www.geocities.com/g_w_reynolds/gfn/.

Current search limits are recorded at http://www1.uni-hamburg.de/RRZ/W.Keller/GFNsrch.txt.

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2008-01-28, 17:49	#12
Andi47 Oct 2004 Austria 4662₈ Posts	@Luigi: Did you get my email yesterday? I want to reserve n=32 from k=30e12 to 35e12 (from the "most wanted" list).

2008-01-30, 05:22	#15
geoff Mar 2003 New Zealand 485₁₆ Posts	I am interested in finding more factors for Generalised Fermat Numbers, particularly those of the form b^(2^n)+1 where b>2 is small and even. http://www1.uni-hamburg.de/RRZ/W.Keller/GFNsmall.html A few questions I am trying to answer are: What trial factoring, P-1, ECM work has been done already? Is there any suitable trial factoring software for Linux, optimised for x86-64?

2008-03-12, 21:24	#16
geoff Mar 2003 New Zealand 13×89 Posts	I ended up writing my own program (for x86-64 Linux) to find small factors of generalised Fermat numbers a^(2^m) + b^(2^m). http://www.geocities.com/g_w_reynolds/gfn/. Current search limits are recorded at http://www1.uni-hamburg.de/RRZ/W.Keller/GFNsrch.txt.