Perfect numbers: Revision history

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2 February 2011

30 January 2011

20 January 2011

22 November 2010

21 November 2010

20 November 2010

15 November 2010

31 October 2010

29 October 2010

26 September 2010

10 September 2010

25 August 2010

24 August 2010

20 August 2010

19 August 2010

13 August 2010

8 August 2010

5 August 2010

26 July 2010

23 July 2010

17 July 2010

15 May 2010

31 March 2010

22 March 2010

10 March 2010

6 February 2010

22 January 2010

7 January 2010

21 November 2009

17 November 2009

27 September 2009

6 September 2009

6 August 2009

4 August 2009

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