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Re: 48^p-47^p

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  • grostoon
    ... 2762907758494613432722057848250457745983. ... Hi Paul, Sure, MPQS gives the answer in a short time with a recent computer. But I was just focusing on the
    Message 1 of 8 , Nov 28, 2003
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      > I know it's small enough for you to have
      > succeeded, but it took a MPQS implementation 51 seconds to find the
      > factors 31467085354882538839727 and
      2762907758494613432722057848250457745983.
      >

      Hi Paul,

      Sure, MPQS gives the answer in a short time with a recent computer.
      But I was just focusing on the fact that the factors of such numbers
      are not obvious in general. Otherwise, it could have been used to
      prove that 48^p-47^p is never prime maybe ...

      Until now, the only thing one can say about them is that they are of
      the form 2*k*p+1 for some integer k.

      J-L. Charton
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