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GeneralRe: find lower bound Pin
liquid_18-Nov-10 20:25
liquid_18-Nov-10 20:25 
GeneralRe: find lower bound Pin
NeverHeardOfMe18-Nov-10 21:49
NeverHeardOfMe18-Nov-10 21:49 
GeneralRe: find lower bound Pin
harold aptroot18-Nov-10 21:35
harold aptroot18-Nov-10 21:35 
AnswerRe: find lower bound Pin
Alain Rist18-Nov-10 23:24
Alain Rist18-Nov-10 23:24 
GeneralRe: find lower bound Pin
liquid_20-Nov-10 11:32
liquid_20-Nov-10 11:32 
GeneralRe: find lower bound Pin
Alain Rist20-Nov-10 20:04
Alain Rist20-Nov-10 20:04 
GeneralRe: find lower bound Pin
liquid_21-Nov-10 5:09
liquid_21-Nov-10 5:09 
QuestionTIL...... [modified] Pin
NeverHeardOfMe3-Nov-10 23:57
NeverHeardOfMe3-Nov-10 23:57 
...an extraordinary fact - probably known to half of you, but nevertheless I thought I'd share it. It's not an alogorithm, but never mind!

The square of any prime number >= 5 can be expressed as 1 + a multiple of 24

or

If p is prime, then p ^ 2 = 1 + 24 * n, for some n


Don't know about you, but I think that's quite amazing. Why is it true at all, and given that it is, where does 24 come from?! (Pity it's not 42 really!)

[edit] When I ask "where does 24 come from?" I am not asking for a mathermatical proof - I can look that up myself. It's more just a metaphysical musing...)

modified on Thursday, November 4, 2010 6:37 AM

AnswerRe: TIL...... Pin
Radhakrishnan G.4-Nov-10 1:40
Radhakrishnan G.4-Nov-10 1:40 
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NeverHeardOfMe4-Nov-10 2:38
NeverHeardOfMe4-Nov-10 2:38 
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Richard MacCutchan4-Nov-10 2:46
mveRichard MacCutchan4-Nov-10 2:46 
GeneralRe: TIL...... Pin
NeverHeardOfMe4-Nov-10 2:57
NeverHeardOfMe4-Nov-10 2:57 
GeneralRe: TIL...... Pin
Richard MacCutchan4-Nov-10 3:24
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NeverHeardOfMe4-Nov-10 3:28
NeverHeardOfMe4-Nov-10 3:28 
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Richard MacCutchan4-Nov-10 6:09
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NeverHeardOfMe4-Nov-10 6:15
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Luc Pattyn4-Nov-10 4:56
sitebuilderLuc Pattyn4-Nov-10 4:56 
GeneralRe: TIL...... Pin
NeverHeardOfMe4-Nov-10 5:18
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AnswerRe: TIL...... Pin
Luc Pattyn4-Nov-10 6:10
sitebuilderLuc Pattyn4-Nov-10 6:10 
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NeverHeardOfMe4-Nov-10 6:39
NeverHeardOfMe4-Nov-10 6:39 
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redbones10-Nov-10 1:03
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Luc Pattyn4-Nov-10 4:58
sitebuilderLuc Pattyn4-Nov-10 4:58 
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NeverHeardOfMe4-Nov-10 5:23
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_Erik_4-Nov-10 6:53
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NeverHeardOfMe4-Nov-10 7:20
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