2^primenumber -1 is always a prime number ?

[Batalov]

Originally Posted by ewmayer

Hey, George, I'll bet you never contemplated using Tcl or Python to implement your LL software, you dinosaur. No wonder it took so long to find the latest M-prime! Sheesh...

Nobody uses one-layered software anymore, Ernst! You are behind times.

Definitely Ruby-on-rails. That's it. Must be Ruby on rails. Everybody wears this now.

[chalsall]

Originally Posted by Batalov

Everybody wears this now.

That's SO yesterhour.

[Uncwilly]

Please see the MersenneWiki:
http://mersennewiki.org/index.php/Do...ersenne_number

[aketilander]

Originally Posted by Mastan

MMMMM...p is always a prime number ?

No, I don't think so. My guess is that MM127 has about 80 factors, but since its such a large number even the smallest one is very hard to find and require so much work. If I continue searching for another half year, with the speed I have now, I have about 1% chance of finding the smallest one as prime95 said.

For 4 MMp:s factors have already been found, that is for MM13, MM17, MM19, MM31, but maybe you meant that "MMMMM...p for p=2 is always a prime number?", but as I said I believe MM127 has many factors.

[aketilander]

Originally Posted by Prime95

and I'm rooting for you hard. You've got about a 1% chance of finding a factor with a lot more effort.

I didn't reply to this George because I was unsure of the meaning of "I'm rooting for you hard". Sometimes english is a little difficult for me, but if it means what I think it means, that is, that you have put a lot of work into programming mmff which I am using in the search, I want to say that I am very grateful for this!!!

... and who knows maybe we are lucky and find a factor!

[Prime95]

Originally Posted by aketilander

I was unsure of the meaning of "I'm rooting for you hard".

It means I sincerely hope you find a factor!

[aketilander]

Originally Posted by Prime95

It means I sincerely hope you find a factor!

OK, I see, thanks!!!

[xilman]

Originally Posted by aketilander

I didn't reply to this George because I was unsure of the meaning of "I'm rooting for you hard". Sometimes english is a little difficult for me, but if it means what I think it means, that is, that you have put a lot of work into programming mmff which I am using in the search, I want to say that I am very grateful for this!!!

... and who knows maybe we are lucky and find a factor!

You're wise to be cautious. "Rooting" in Australian English has a colloquial meaning. Roughly speaking, that meaning is equivalent to "having sex with an animal".

[ET_]

Originally Posted by xilman

You're wise to be cautious. "Rooting" in Australian English has a colloquial meaning. Roughly speaking, that meaning is equivalent to "having sex with an animal".

Now I need to learn the etymology of "rooting"... Does it come from root --> caring form the root --> ?

Luigi

[chalsall]

Originally Posted by xilman

You're wise to be cautious. "Rooting" in Australian English has a colloquial meaning. Roughly speaking, that meaning is equivalent to "having sex with an animal".

And in Unix geek-speak, "rooting" means to take super-user control (of a system)....

[chalsall]

Originally Posted by ET_

Now I need to learn the etymology of "rooting"...

A complete tangent, but anyone who enjoys words would find the book "The Professor and the Madman" (sub-title "A Tale of Murder, Insanity, and the Making of OED") by Esther Lombardi very worth the time.