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Fibonacci Numbers

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Alaspi
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26 May 2008, 8:55 pm

9280869025


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27 May 2008, 11:00 am

15406911074


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Douglas_MacNeill
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27 May 2008, 11:48 am

24687780099



twoshots
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27 May 2008, 1:30 pm

ebec11 wrote:
3154826976

I hate to break it to you, but that's not a Fibonacci number...
In case anyone wants to do fact checking from time to time,
F(n)= [f^n - (-f)^(-n)]/[5^(.5)]
where f = [1 + 5^.5]/2 is the golden ratio.
To get this back on track, let n = 48:
[f^48 - (-f)^(-48)]/[5^.5] = 2971215073+1836311903 =

4807526976


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richie
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27 May 2008, 3:01 pm

twoshots wrote:
ebec11 wrote:
3154826976

I hate to break it to you, but that's not a Fibonacci number...
In case anyone wants to do fact checking from time to time,
F(n)= [f^n - (-f)^(-n)]/[5^(.5)]
where f = [1 + 5^.5]/2 is the golden ratio.
To get this back on track, let n = 48:
[f^48 - (-f)^(-48)]/[5^.5] = 2971215073+1836311903 =

4807526976

richie wrote:
6126042049

This is obviously erroneous......
To avoid error simply copy and paste into windows calculator and then check the number with O.E.I.S.......

2971215073+4807526976=7778742049
7778742049=6168709x97x13


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richie
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27 May 2008, 3:10 pm

4807526976+7778742049=12586269025

Hopefully we are back on track.....


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Xelebes
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27 May 2008, 3:19 pm

20 365 011 074



richie
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27 May 2008, 3:38 pm

20365011074+12586269025=32951280099


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Xelebes
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27 May 2008, 3:43 pm

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ebec11
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27 May 2008, 3:44 pm

Sorry :oops: :oops: :oops:



CityAsylum
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27 May 2008, 4:04 pm

32951280099
53316291173
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86267571272



Xelebes
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27 May 2008, 4:18 pm

139 583 862 445



richie
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27 May 2008, 5:05 pm

53316291173+86267571272=139583862445


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Xelebes
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27 May 2008, 5:12 pm

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richie
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27 May 2008, 5:17 pm

225 851 433 717+139583862445=365435296162


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Xelebes
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27 May 2008, 5:23 pm

58th Fibonacci Number: 591 286 729 879