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Mersenne prime numbers can be expressed as 2^n - 1.
The 50th known Mersenne was discovered Dec 26 2017.
It is 2^77232917 - 1.
It has more than 23 million digits.
What can you do about it?
Well, Mersenne.org is asking for donations.  And, if you have a reasonably fast PC that you can leave running for a week or two, you can join the hunt for number 51 and get your name in the math history books. See their website:
List of known Mersenne prime numbers - PrimeNet[^]
Get me coffee and no one gets hurt!
modified 5-Jan-18 17:34pm.
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I'm pretty sure I dropped #51 on the floor and it rolled behind the stove. We'll likely never see it again.
There are two kinds of people in the world: those who can extrapolate from incomplete data.
There are only 10 types of people in the world, those who understand binary and those who don't.
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I use #51 as my PayPal password.
Takes a while to type in, but that's good - it stops me buying cr@p on FleaBay.
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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You realize that you just told the whole world your PP password?! 
Get me coffee and no one gets hurt!
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By the time anyone gets round to typing it in, I'll have swapped to #52 ... 
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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I take for granted that you are not representing the number in base 10, are you?
Such passwords are much better represented in base 7.
Or you may use base 36, i.e. 0-9a-z. Then people won't even suspect that it is a number, and it shortens it down a little bit, too.
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Such passwords are better represented in baseball.
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Was too busy with my Wife's 50th birthday that day to worry about maths.
Michael Martin
Australia
"I controlled my laughter and simple said "No,I am very busy,so I can't write any code for you". The moment they heard this all the smiling face turned into a sad looking face and one of them farted. So I had to leave the place as soon as possible."
- Mr.Prakash One Fine Saturday. 24/04/2004
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Has Anyone Seen Mike Hunt wrote: Was too busy with my Wife's 50th birthday that day to worry about maths.
Cradle robber!
Will Rogers never met me.
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She is. I'm 50 in 10.5 months.
Michael Martin
Australia
"I controlled my laughter and simple said "No,I am very busy,so I can't write any code for you". The moment they heard this all the smiling face turned into a sad looking face and one of them farted. So I had to leave the place as soon as possible."
- Mr.Prakash One Fine Saturday. 24/04/2004
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I had no idea that you were just a babe, Mick. Good for her, though - cougar that she is. She scored a good one, so long as your liver can hold on... 
Will Rogers never met me.
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Saw this headline in today's NPR feed:
"Meanwhile In Australia, Part Of A Highway Is Literally Melting"
A human being should be able to change a diaper, plan an invasion, butcher a hog, navigate a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects! - Lazarus Long
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stoneyowl2 wrote: Meanwhile In Australia, Part Of A Highway Is Literally Melting
I guess it's warm down under?
Latest Article - Code Review - What You Can Learn From a Single Line of Code
Learning to code with python is like learning to swim with those little arm floaties. It gives you undeserved confidence and will eventually drown you. - DangerBunny
Artificial intelligence is the only remedy for natural stupidity. - CDP1802
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Well it's 45 Celsius where I am today (you can convert that to fernheit ya weirdos. Done it in my headvbut not telling you) and the entire street and surrounding streets are blacked out.
So no air conditioning, only beer to keep me going.
Also the say after my Daughters 18th birthday piss up. I all good, she isn't.
Michael Martin
Australia
"I controlled my laughter and simple said "No,I am very busy,so I can't write any code for you". The moment they heard this all the smiling face turned into a sad looking face and one of them farted. So I had to leave the place as soon as possible."
- Mr.Prakash One Fine Saturday. 24/04/2004
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Well, wish her a happy birthday from Bullhead City, AZ, where 45C is a cool spring afternoon! 
Will Rogers never met me.
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Turned out we peaked at 47.3 Celsius.
Michael Martin
Australia
"I controlled my laughter and simple said "No,I am very busy,so I can't write any code for you". The moment they heard this all the smiling face turned into a sad looking face and one of them farted. So I had to leave the place as soon as possible."
- Mr.Prakash One Fine Saturday. 24/04/2004
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A friend in Sydney said that was the temp there. YOW!
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What do the mean by Literally? Either it is melting or it is not.
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Probably means they arent looking at the highway through wonky glass that distorts it and makes it look runny. 
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Consider someone gesturing that a fish they caught was "this big".
Now, consider the same gesture with the words it was "literally this big"
The first would be understood to more likely be an exaggeration than the second. We're jovial and informal by nature. Even our free-to-air tv ads shown at 4:30pm have words considered inappropriate in some parts of the world.
A Toyota ad had people saying bugger. A word which, depending on context may mean damn, (as in this example) or go away - bugger off mate! Other examples of its use would be: bugger that for a joke!
Or something's buggered - it's no good and doesn't work any more. It pretty much well never references any kind of sex-act. Calling someone a sod is a simple slight, telling 'em to sod off is merely way of telling someone to go away. In Aus and NZ it's a reference to dirt - again, not to a sex-act.
A WorkSafe ad from the government had a girl cutting herself on a bread-slicing machine. She exclaimed: sh1t!
So, getting back to the original question - it wouldn't be uncommon nor misunderstood if someone said the road was melting that it's bloody hot. If they said the road was literally melting, you know that well, the road is actually coming apart.
A funny saying goes something like this:
Australians - calls mates sunshine and calls sunshines mate. (sunshine rhymes with front doesn't it?)
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enhzflep wrote: sunshine rhymes with front doesn't it?
Certainly does on this forum. 
[edit]
BTW how do you pronounce your name?
[/edit]
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Simon. 
Oh.. my username :smirk:
Basically, with a silent aitch. Enz-flep. It was my password to the unix computers at uni. So hard to remember, that once done I just couldn't forget it. It was unique then and remains so. I used to pronounce it E.N.Aitch.Zed - F.L.Ee.Pee - but my missus turned it into something far less tortuous and that's how it's remained.
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enhzflep wrote: Simon
Same as my eldest son (who may well be older than you  ).
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Elvis checked out 8 days after I checked in.
Ate Ate Seven Seven
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We had justcome back from two years living in Ankara. Simon checked in a month before Neil Armstrong (allegedly) stepped down onto the moon's surface.
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