11 digit prime

bflynn

bflynn

Final Approach
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Brian Flynn
hopmedic said:
Rich

Enter any 11 digit prime number to continue...
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Completely off every topic on the board, but I thought you'd all be excited to know that if you're ever faced with this question, there is a simple answer. 99,999,999,977 is an 11 digit prime number that is easy to remember - nine 9s and 77. It happens to be the largest 11 digit prime number.

Unfortunately, if you're like me, you probably can't afford the brain space to actually remember that piece of trivia...
 
bflynn said:
Completely off every topic on the board, but I thought you'd all be excited to know that if you're ever faced with this question, there is a simple answer. 99,999,999,977 is an 11 digit prime number that is easy to remember - nine 9s and 77. It happens to be the largest 11 digit prime number.

Unfortunately, if you're like me, you probably can't afford the brain space to actually remember that piece of trivia...
Click to expand...

You may continue.
 
I answered that a while back, not really difficult if you think about it a moment.
 
I found that my ten digit home phone number was a prime number.
 
Oh fun. Prime number generators. Centuries ago I wrote a program to find prime numbers and left it running for a couple months. I'll have to see if I can find the last prime number file it generated. Big prime numbers.
 
I have a very fast algorithm for factoring larger prime numbers.
 
flyingron said:
I have a very fast algorithm for factoring larger prime numbers.
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Me too...factoring primes is easy! The factors are the number itself and 1.

Now, if you could quickly factor the product of two large prime numbers, right there you'd have the keys to every public-key encryption algorithm in existence.
 
The largest known prime number has 12,978,189 digits. Please type out the number (in long form) to continue.
 
AirDC said:
The largest known prime number has 12,978,189 digits. Please type out the number (in long form) to continue.
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You can shorten the number of digits by going to hexadecimal format. Question: Is ABCDEF123456789 Hex a prime?

José
 
Piloto said:
Question: Is ABCDEF123456789 Hex a prime?
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Think about it for a moment.

11 is just a symbolic representation for eleven things, like eleven stars:
***********

In hex, B = decimal 11 which means B stars is:
***********

How would *********** only be divisible by * and *********** in dec but possibly be divisible by something else in hex?
 
bflynn said:
Completely off every topic on the board, but I thought you'd all be excited to know that if you're ever faced with this question, there is a simple answer. 99,999,999,977 is an 11 digit prime number that is easy to remember - nine 9s and 77. It happens to be the largest 11 digit prime number.

Unfortunately, if you're like me, you probably can't afford the brain space to actually remember that piece of trivia...
Click to expand...
:rofl: :rofl: :rofl: :rofl:
I can't believe someone took the time to bother with this! ROFL!
Henning said:
I answered that a while back, not really difficult if you think about it a moment.
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I wish I'd noticed! I didn't! Sorry, Henning!
Teller1900 said:
:rofl: Of all the things I never thought to investigate...
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Me, too - and it's MY sig!
flyingron said:
I have a very fast algorithm for factoring larger prime numbers.
Click to expand...
Ummmm.... What?
 
Greebo said:
Think about it for a moment.

11 is just a symbolic representation for eleven things, like eleven stars:
***********

In hex, B = decimal 11 which means B stars is:
***********

How would *********** only be divisible by * and *********** in dec but possibly be divisible by something else in hex?
Click to expand...

Are there binary prime numbers like 010001101001? After all you only have two options; either divide by 1 and you get same number or divide by 0 and you get infinity.

José
 
Piloto said:
Are there binary prime numbers like 010001101001? After all you only have two options; either divide by 1 and you get same number or divide by 0 and you get infinity.

José
Click to expand...
Not a valid argument. In binary, the number 100 represents four objects. Those objects can be divided into groups of 4, or two groups of 2. You're not correctly applying mulitplication here. You can divide 100 by 10 and get 10 (hmmm... that works in binary AND decimal). If 100 (4) was prime, it would only be divisible by 1 and 100 (1 and 4). It's not.
 
This was the nerdiest and one of the most entertaining threads ive read in a while... And yes i think i can remember 99999999977!
 
ntbjounin said:
This was the nerdiest and one of the most entertaining threads ive read in a while... And yes i think i can remember 99999999977!
Click to expand...
Ah, but there is a difference between nerd and geek... and I am most definitely NOT a nerd! :nono: :no:
 
Somebody should be working for Google. Back before the IPO Google had this billboard as a recruitment tool.

It reads "first 10-digit prime found in consecutive digits of e.com"


Google%20Billboard.jpg


The answer is '7427466391.com'. If you went to that address you were asked another question and still had yet to see 'Google' anywhere. If you got that question right you were directed to Google's recruitment page.

Here's the Link to the full story.
 
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