• Toolz
  • #! Die-hard
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  • From: Asia
  • Registered: 2009-02-02
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Topic: Special User IDs

Mine is 797 and I tried to figure out what was special about it. Low-hanging fruit: is it a prime? Yes!

I'm terrible with numbers so I had to check here:
http://en.wikipedia.org/wiki/List_of_prime_numbers

I got really interested in all those special kinds of prime numbers and discovered my UID is a Palindromic prime, Super-prime and a Truncatable prime.

Those of you with lower IDs would find more matches I'm sure. Anybody got anything interesting?

You find your UID in the status bar when you hover over your username (or in the address bar when you click it).

  • From: California, USA
  • Registered: 2008-11-29
  • Posts: 8,647

Re: Special User IDs

For a minute I thought you meant the linux user ID tongue

Anyways my forum user number 77 is not prime, but according to here:

http://www2.stetson.edu/~efriedma/numbers.html

77 is the largest number that cannot be written as a sum of distinct numbers whose reciprocals sum to 1.

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  • Toolz
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Re: Special User IDs

Great list! 797 is "is the number of functional graphs on 9 vertices" ... nice to know!

  • omns
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Re: Special User IDs

Mine is 13. Unlucky for some but also the number of Archimedian solids.

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  • Toolz
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Re: Special User IDs

omns wrote:

Mine is 13. Unlucky for some ...

But it's a Lucky Prime. Also a Happy Prime. Plus a load more!

  • From: Lincoln, UK
  • Registered: 2008-11-20
  • Posts: 4,429

Re: Special User IDs

Mine is 2, it rhymes with...

big_smile

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  • omns
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Re: Special User IDs

^ lol

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  • rsw
  • #! CrunchBanger
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  • Registered: 2009-08-26
  • Posts: 100

Re: Special User IDs

3020 is the closest integer to π.

Cool cool

  • benj1
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  • From: Yorkshire, England
  • Registered: 2009-09-05
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Re: Special User IDs

3129

well according to wolfram alpha:

3129 is an odd number.
3129 has the representation 3129 = 5^5+4.
3129 divides 44^12-1.

then of course theres
3129 Bonestell
http://en.wikipedia.org/wiki/3129_Bonestell

also
3*(1+2)=9
spooky

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  • From: Texas
  • Registered: 2009-07-27
  • Posts: 87

Re: Special User IDs

2710 is an hexagonal prism number.

If only I knew what such things meant.

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  • benj1
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Re: Special User IDs

hailukahh wrote:

2710 is an hexagonal prism number.

If only I knew what such things meant.

well a hexagon has 6 sides

a hexagonal prism has 8 sides

.....

so yeah obviously 2710 roll

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  • From: Texas
  • Registered: 2009-07-27
  • Posts: 87

Re: Special User IDs

Oh, how silly of me roll

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<'(((><  power of God, the salvation of everyone who believes.  ><)))'>

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  • From: Deep in The Swedish Woods
  • Registered: 2008-11-28
  • Posts: 578

Re: Special User IDs

56 is the number of reduced 5×5 Latin squares.

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14 Reply by aim

  • aim
  • #! CrunchBanger
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  • From: Christchurch, New Zealand
  • Registered: 2009-07-26
  • Posts: 226

Re: Special User IDs

The Year 2691 will have four solar eclipses... However, nothing else is special tongue

  • From: VIC Australia
  • Registered: 2009-09-15
  • Posts: 33

Re: Special User IDs

corenominal wrote:

Mine is 2, it rhymes with...

big_smile

The first thing I thought of was "foo", how geeky am I.. hmm

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  • From: Lincoln, UK
  • Registered: 2008-11-20
  • Posts: 4,429

Re: Special User IDs

ElbertF wrote:
corenominal wrote:

Mine is 2, it rhymes with...

big_smile

The first thing I thought of was "foo", how geeky am I.. hmm

Very! lol

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