Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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#26 2013-01-14 07:47:24
- noelevans
- Full Member
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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.
#27 2013-01-14 08:04:22
- mathgogocart
- Super Member
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Re: post prime numbers!
9/bold-11.
bbcode;.Uhhhhhhhhh im bored.
"Those who feed spambots are spambot conspiarators,and bad people." mathgogocart.
#28 2013-01-14 08:16:35
- bobbym
- Administrator
Online
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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#29 2013-01-14 08:36:55
- mathgogocart
- Super Member
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Re: post prime numbers!
Omg.
bbcode;.Uhhhhhhhhh im bored.
"Those who feed spambots are spambot conspiarators,and bad people." mathgogocart.
#30 2013-04-19 18:16:08
- julianthemath
- Super Member
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Re: post prime numbers!
13 - The unlucky number
That's why there is a Friday the 13th!
Buy 1
for $1, 
for $0.50, 
for $3, 
for $2.50, 
for $1.25, 
for $0.25, and 
for $5.Come on, buy a smiley!
#31 2013-04-19 20:43:46
- Agnishom
- Super Member
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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'
'The whole person changes, why can't a habit?' -65
#32 2013-04-20 11:07:19
- julianthemath
- Super Member
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Re: post prime numbers!
7 - the luckiest number
That's why there's Lucky seven.
Buy 1
for $1, for $0.50, for $3, for $2.50, for $1.25, for $0.25, and for $5.Come on, buy a smiley!