
Shyam Sunder Gupta
Executive Director, Railway Board
New Delhi, India
Telephone: (011) 23384110(O), 23369814(R)
email: guptass@rediffmail.com
http://www.shyamsundergupta.com/
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What is New? (Update 10th May, 2009) The page on Rare Numbers updated and enlarged (List up to 1020 ). CYF NO. 37 solutions by Luke Pebody , Jens Kruse Andersen, Donovan Johnson, Fred Schneider given. CYF NO. 32 Comments by Luke Pebody given. The page on Smith Numbers updated. CYF NO. 36 solutions by Luke Pebody , Bruno Mishutka given. CYF NO. 35 solutions by Jaroslaw Wroblewski , Fred Schneider, Donovan Johnson given. Prime curios 1123, 23111...07673 (33-digits)added. |
Do You Know?Every even number greater than 46 can be expressed as sum of two abundant numbers. |
Can You Find?CYF NO. 39 10 primes such that sum of their combinations generate maximum number of distinct primes.email your answer |
Contents
Note: The above topics including many more will be added in due course.
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My Contributions in Prime CuriosPrime Curios! - site maintained by G. L. Honaker Jr. and Chris Caldwell
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My Favorite Links
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Send me e-mail at guptass@rediffmail.com
This page was last updated on 10th May, 2009.
Copyright © 2001-2009 Shyam Sunder Gupta. All rights reserved.