Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#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.

Offline

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

mathgogocart
Member
Registered: 2012-04-29
Posts: 1,426

Re: post prime numbers!

9/bold-11.


Hey.

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,795

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.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

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

mathgogocart
Member
Registered: 2012-04-29
Posts: 1,426

Re: post prime numbers!

Omg.


Hey.

Offline

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

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,845
Website

Re: post prime numbers!

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


"Double the fun, double the thrill, double the coolness" - Julianthewiki

Offline

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

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 16,888
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'
'Humanity is still kept intact. It remains within.' -Alokananda

Online

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

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,845
Website

Re: post prime numbers!

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


"Double the fun, double the thrill, double the coolness" - Julianthewiki

Offline

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

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,845
Website

Re: post prime numbers!

2^57,885,161-1


"Double the fun, double the thrill, double the coolness" - Julianthewiki

Offline

Board footer

Powered by FluxBB