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Re: prime with sum of digits < 5 ?

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  • d.broadhurst@open.ac.uk
    Jack Brennen wrote ... Thanks Jack. In http://groups.yahoo.com/group/primenumbers/message/3496 I noted that no 9-bit prime exists with precisely three 1
    Message 1 of 6 , Nov 27, 2001
      Jack Brennen wrote

      > No 26 bit primes exist with fewer than four '1' bits.

      Thanks Jack. In

      http://groups.yahoo.com/group/primenumbers/message/3496

      I noted that no 9-bit prime exists with precisely three '1' bits.
      However, 100000001=257 is prime, so we have to wait
      for 26 bits before four '1' bits become necessary.

      David
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