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Help! (with factoring a c119)

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  • mrmarkhudson
    Dear GGNFS users, I ve had a great deal of success making use of the perl script and even running the programs independently to factor a fair number of
    Message 1 of 2 , Sep 1, 2006
      Dear GGNFS users,

      I've had a great deal of success making use of the perl script and
      even running the programs independently to factor a fair number of
      composites of varying sizes (largest so far a c124), but recently I've
      encountered a problem.

      The following c119:

      14249935272083465326502879191439842546932614168918661115501087325814892019916054507199018859077917912387090239152861961

      has failed on at least 5 (I've lost count) occasions at the matsolve
      stage. On each occasion, with different amounts of sieving and
      different values of maxrelsinff from 24 to 32, matsolve fails because
      of a Column n = Column m error.

      Also, when trying -prune 0.01 on the relations that have been
      gathered, all that seems to happen is that matbuild then fails with
      another error when trying to use these pruned relations.

      I've tried using the 2005 and 2006 releases of the executables.

      Would anyone be able to give this number a try?

      Or does anyone have some advice on what to do when the duplicate
      column error occurs?

      Thanks,

      Mark.
    • DarkAngel55us
      Never had your problem. Only the sqrt program did fail twice with trivial factorizations... ...
      Message 2 of 2 , Sep 1, 2006
        Never had your problem.
        Only the sqrt program did fail twice with trivial
        factorizations...



        --- mrmarkhudson <mrmarkhudson@...> wrote:

        > Dear GGNFS users,
        >
        > I've had a great deal of success making use of the
        > perl script and
        > even running the programs independently to factor a
        > fair number of
        > composites of varying sizes (largest so far a c124),
        > but recently I've
        > encountered a problem.
        >
        > The following c119:
        >
        >
        14249935272083465326502879191439842546932614168918661115501087325814892019916054507199018859077917912387090239152861961
        >
        > has failed on at least 5 (I've lost count) occasions
        > at the matsolve
        > stage. On each occasion, with different amounts of
        > sieving and
        > different values of maxrelsinff from 24 to 32,
        > matsolve fails because
        > of a Column n = Column m error.
        >
        > Also, when trying -prune 0.01 on the relations that
        > have been
        > gathered, all that seems to happen is that matbuild
        > then fails with
        > another error when trying to use these pruned
        > relations.
        >
        > I've tried using the 2005 and 2006 releases of the
        > executables.
        >
        > Would anyone be able to give this number a try?
        >
        > Or does anyone have some advice on what to do when
        > the duplicate
        > column error occurs?
        >
        > Thanks,
        >
        > Mark.
        >
        >
        >
        >
        >


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