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  • Euler's Totient Function

    Let N be any composite. Find semi-prime Sp = uv such that (2u+1)(2v+1) <= N <= 3(2Sp+1). or N <= (2u+1)(2v+1) < 3(2Sp+1) [[ For example let N = 65 then

    yourskadhir 13 hours ago
  • My book "Mathematical Essays" is now available on Amazon.com

    My book "Mathematical Essays" is now available on Amazon.com http://www.amazon.com/dp/1500735388/ http://www.amazon.co.uk/dp/1500735388/

    kermit1941 8 days ago
  • Is there any problems with this proof?

    Below is a proof based on the ratio of A005250(n+1)/A005250(n) with the OEIS sequence.  Can someone look at it and tell me if it true or what the problem is?

    reddwarf2956 11 days ago
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Group Description

PrimeNumbers is a e-mail discussion list for those
who enjoy prime numbers.  Some look for patterns,
some seek to find new records, others try to understand
the distribution.  We try to limit our discussion to
prime numbers, primality testing, and very closely
related subjects.

If you enjoy prime numbers there are similar lists you
might enjoy, such as PrimeForm
focusing on primality proving programs and
Primes list. 

If you think you have a Goldbach proof, then please note that there are groups which deal specifically with such matters, perhaps try those first?

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Group Information

  • 1109
  • Number Theory
  • Dec 27, 2000
  • English

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