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Old April 2nd 13, 05:44 AM posted to sci.astro,sci.math
Robert Clark
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Posts: 1,150

On Mar 27, 5:42*am, wrote:
A new conjecture about primes

Any number ending by 1,3,7 or 9 leads to an infinity of primes ending by that number.

For instance, the number 9999 leads to the primes 49999, 59999, 79999, 139999, 179999, 199999, 239999, 289999, 329999, 379999, 389999, 409999, 419999, 529999, etc.

This is contained within Dirichlet's theorem on arithmetic


Bob Clark

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