Hi,
I've posted on my ftp server a file which may be of interest to
anyone developing or verifying the operation of LL testing programs.
The URL of the file is
ftp://lettuce.edsc.ulst.ac.uk/gimps/PrimeQA/QADATA.TXT
The format is
exponent,# iterations,residual,program id,max error
The residual listed is the hexadecimal representation of the low
orfer 64 bits of the complete residual. The program id is always
"lucdwt"; the max error can be ignored (basically it's there as a
self-check to make sure that a sensible FFT size was used to generate
the data).
The range of exponents is selected exponents between 8,000 and
80,000,000. The low 64 bits of the residual after 400 iterations is
listed for every exponent in the file. (After one iteration the
residual should be 000000000000000E for every exponent). For
exponents less than 4,000,000, the residual after 1,000 iterations is
also listed. For exponents greater than 20,000,000, the residual
after 100 iterations is also listed.
The results were generated on a 533 MHz Alpha 21164LX system; the
program used is a version of lucdwt (included in Richard Crandall's
giantint package), modified to produce output in a suitable format.
I hope that this data assists anyone developing or modifying LL
testing software to ensure that their code is operating correctly.
PLEASE INFORM ME IMMEDIATELY if you should detect what appears to be
a genuine mistake in the data.
In the near future I intend to enhance this file to include the
residual after 1000 and after (n-2) iterations for all odd n between
500 and 8000. If anyone has any suggestions as to any further data
which may usefully be included, please contact me. I'm afraid I am
unable to proceed beyond exponent 80 million due to system
limitations, my Alpha system has "only" 320 MB RAM.
Regards
Brian Beesley
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