2^primenumber -1 is always a prime number ?

[Xyzzy]

Another:

root around = rooting, rooted

http://idioms.thefreedictionary.com/root+around

[ewmayer]

In US usage (and George's) to root == to cheer. Fans root for their team, etc.

[NBtarheel_33]

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".

Yeah, it's fun being a kid growing up with an Australian dad, as I did. He'd say stuff like "this is rooted" when something was broken, or "I'm rooted" when he was tired, and then I'd pick up this slang, repeat it in front of my mother, and she'd be all "OMG BBQ Where did you learn that?!?"

I remember hearing it for repeating "hells bells" and "fair suck of the sav" (still not sure what the exact etymology of that one is, but my mother says that there was a sausage variety in Australia known as Savoy, so "fair suck of the sav" could have potentially "dirty" sexual connotations) among others.

Interestingly, I heard "hells bells" (or more like "hay-ells bay-ells") quite a bit whilst living in Georgia. So perhaps it is originally a Scotch/Irish bit of slang that spread more widely in the Empire than one might first expect.

Not as bad as "tabarnak" or "gadzooks" of course...

[ET_]

Originally Posted by NBtarheel_33

Yeah, it's fun being a kid growing up with an Australian dad, as I did. He'd say stuff like "this is rooted" when something was broken, or "I'm rooted" when he was tired, and then I'd pick up this slang, repeat it in front of my mother, and she'd be all "OMG BBQ Where did you learn that?!?"

I remember hearing it for repeating "hells bells" and "fair suck of the sav" (still not sure what the exact etymology of that one is, but my mother says that there was a sausage variety in Australia known as Savoy, so "fair suck of the sav" could have potentially "dirty" sexual connotations) among others.

Interestingly, I heard "hells bells" (or more like "hay-ells bay-ells") quite a bit whilst living in Georgia. So perhaps it is originally a Scotch/Irish bit of slang that spread more widely in the Empire than one might first expect.

Not as bad as "tabarnak" or "gadzooks" of course...

rooted --> rotten?

"Hells-bells" --> South of USA had a massive Irish immigration on the last 18th and 19th century. While they usually preferred urban neighborhoods, a good deal of them moved South to help with the estates.

E.T.

[aketilander]

Originally Posted by NBtarheel_33

He'd say stuff like "this is rooted" when something was broken, or "I'm rooted" when he was tired

Maybe this is a completely different meaning of the word? I come to think of: "The word bankruptcy is derived from Italian banca rotta, meaning "broken bench", which may stem from a custom of breaking a moneychanger's bench or counter to signify his insolvency, or which may be only a figure of speech."

Thank you all for a very interesting and clarifying discussion.

[ATH]

I'm using wordreference.com a lot with "english definition":

http://www.wordreference.com/definition/root

Last one on that list:

root
vb
(intransitive) usually followed by for: informal to give support to (a contestant, team, etc), as by cheering
Etymology: 19th Century: perhaps a variant of Scottish rout to make a loud noise, from Old Norse rauta to roar

[alpertron]

Originally Posted by Mastan

Hi ,
POWER(2,2)-1 is primenumber (3)
POWER(2,3)-1 is a primenumber (7)
POWER(2,7)-1 is a primenumber (127)
POWER(2,127)-1 is also a primenumber ( 170141183…884105727 )

so this also probably be a primenumber
POWER(2,170141183…884105727 ) -1 . Please let me know if it is really proved to be not a prime number ?

Using the same reasoning, 3 is prime, 5 is prime, 7 is prime, well, all odd numbers greater than 1 are prime numbers. Why do you think that the fifth number in the sequence should be prime?

[firejuggler]

small number law? ;p