[QUOTE=Dubslow;304505]
Préférez-vous parler en français? J'en connais un peu et il y a au moins une autre personne sur cet forum qui est français.[/QUOTE]... and there's [url]http://www.microsofttranslator.com/[/url] for those of us wishing to follow along. :smile:

Thank you very much Dubslow and Cheesehead. That explains a lot. Do I have to be LL testing to be a member of this club? I sort of do and don't want to tell Larry (geo-teacher-mentor) about the divisor. I sent him an email about Paris figuring he might tell me if [I] he [/I] found the divisor. I figure GIMPS checks every 70 minutes, right? Then there is the proverb about right hand not paying attention to left. Please assure me that is all it is. I have a charitable imagination and can't fathom being assigned such a project after the fact(or). What I was trying to do was make "Contact" that would enable me to access the work thread while nannying since I get to use the computer when the kids are at the creche.
A week ago Friday I went to LIP 6 and was introduced to real mathematicians. Each department head posed some problem that seemed interesting. I got to add my scribble to the bottom of amazing (labyrinthian) blackboards. Everybody knew "just the guy to see" as I was escorted (pushed) down the halls to meet the multitude of singularity guises. Finally a distinguished grandfather figure in probability (whom I must return and thank ) sent me across the Seine to the right man. I mistakenly thought I was being pounded off, parted out, "here's your hat...", dumped upon some poor unwitting graduate student. I could not have been more wrong.
I can't wait to tell you, or show numbers (which is what I like). Suffice it to say the children were picked up by their mother ( who left work knowing how much this meant to me) as champaign flowed. Next step I guess..." Break out the Big Boy Willie." q.v. Little Red Hen, or, High Priestess of the Desert.

Well, you should probably advise your teacher, lest you continue to waste his effort on a multi-decade LL test of a number already having a factor.

You should also be aware that any test of this size *requires* the use of ECC RAM, rather than regular, every day RAM. There have been several pioneers who have attempted LL tests on numbers of similar size to yours with regular consumer RAM. These tests have spanned multiple years, but every one to date has had a suspect result due to errors in the course of the test.

You would be better suited at this point to run mainstream (e.g. 50M-65M) tests for now. Less test time and chance of error.

LL does not find divisors*. LL is an algorithm that produces only a yes/no answer as an output. It is already known that this answer [U]will be[/U] "no, not prime" because this number is composite (it has a factor). There is absolutely no point in running (or continuing running) that particular multi-year LL.

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* [URL="http://www.mersenne.org/various/math.php"]This webpage[/URL] may help to get an easy introduction into the search process.

And no, Prime95 will not check with PrimeNet to see if there's a factor; it was designed to use as little bandwidth as possible, and checking for factors every 70 minutes is just a waste of bandwidth.

Thank you all for your help. I will tell my teacher to save the computer. Obviously I don't yet know much about these things, but you guys sure do. As for communicating in French I really should be as I need the practice but I speak the French of a Spanish cow. (I'm only here for the summer.) I can't wait to show you all something meaningful. Do any of you ladies/fellows happen to like physics? Like quantum gravity stuff? Here I don't have a single word to say it's allllllll math.

Thanks for guidence
 

[QUOTE=Batalov;304650]LL does not find divisors*. LL is an algorithm that produces only a yes/no answer as an output. It is already known that this answer [U]will be[/U] "no, not prime" because this number is composite (it has a factor). There is absolutely no point in running (or continuing running) that particular multi-year LL.

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* [URL="http://www.mersenne.org/various/math.php"]This webpage[/URL] may help to get an easy introduction into the search process.[/QUOTE]

I got a look at " this webpage". I just saw more about factoring than I ever imagined. I think I can, I think I can learn it. I read about five of those "Golden Books" per day. This red painted tug-boat got rescued and is safe in the tub. I have to get back to LIP 6 though. I'll keep you all informed about the results. Oh, I don't have a computer. I get to one occasionally. I write programs thought, mostly physics for fun. I calculate on a pocket device that eliminates borrowing and carrying errors. In second grade memorization of 7+8 =9+6=15 led to 7*8=9*6=55. Teacher said "God doesn't think so". I suggested we could plead with His mother to make math easier on kids. That turned out to be why I am here again. A theory children can understand will be correct. I'm teaching (just tutoring) girls this time around the block.
(15*15-8*8-7*7)/4 is Perfect...so
Let q be some even quantity of ones in a bi-nary pyramid of ones.
Let A be the line value as 2^q-1=A.
Let (A-1)/2=B
Let A-B=C
How many lines (Asq.-Bsq-Csq)/4 =Perfect ?

1
1 1
1 1 1
1 1 1 1
Obviously I need to figure out how to type math on computers. I pay a girl to do it (better grades). I watch but her fingers just fly. She makes pretty papers and can get them from a flash-drive to my teacher's email. Sometimes Greek symbols seem to get stuck in space. I can lick stamps and solve problems, but I can't move a mouse to save my immortal soul. I hope that is not on the test.