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#26 2013-01-13 08:47:24

noelevans
Member
Registered: 2012-07-20
Posts: 236

Re: post prime numbers!

1234567891 and 123456791  easy to remember primes for testing some things in number theory.
Also  31, 331, 3331, 33331, 333331, 3333331, 33333331 are all prime.


Writing "pretty" math (two dimensional) is easier to read and grasp than LaTex (one dimensional).
LaTex is like painting on many strips of paper and then stacking them to see what picture they make.

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#27 2013-01-13 09:04:22

mathgogocart
Member
Registered: 2012-04-29
Posts: 1,431

Re: post prime numbers!

9/bold-11.


Hey.

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#28 2013-01-13 09:16:35

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,654

Re: post prime numbers!

The fourth repunit prime is huge

And no one knows how many of them there are!


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#29 2013-01-13 09:36:55

mathgogocart
Member
Registered: 2012-04-29
Posts: 1,431

Re: post prime numbers!

Omg.


Hey.

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#30 2013-04-18 20:16:08

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,895
Website

Re: post prime numbers!

13 - The unlucky number
That's why there is a Friday the 13th!


"What is the square root of 2? 1.4141592653589793238" Seriously, I thought it was that. Too round?
3.141592653589793238...

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#31 2013-04-18 22:43:46

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 18,884
Website

Re: post prime numbers!

3691 the only primenumber I have noticed till now in a car's number plate


'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'You have made another human being happy. There is no greater accomplishment.' -bobbym

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#32 2013-04-19 13:07:19

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,895
Website

Re: post prime numbers!

7 - the luckiest number
That's why there's Lucky seven.


"What is the square root of 2? 1.4141592653589793238" Seriously, I thought it was that. Too round?
3.141592653589793238...

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#33 2014-06-03 17:17:59

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,895
Website

Re: post prime numbers!

2^57,885,161-1


"What is the square root of 2? 1.4141592653589793238" Seriously, I thought it was that. Too round?
3.141592653589793238...

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