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Overhaul of the prime-tests #541

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Overhaul of the prime-tests #541

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czurnieden
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  • Removal of the Fermat test mp_prime_fermat
  • Replacement of the Strong Lucas-Selfridge test with the Extra Strong Lucas test with Robert Baillie's parameters P = 3 and Q = 1
  • Additional tests to check the implementations of the Miller-Rabin and Extra Strong Lucas tests

@czurnieden czurnieden added this to the v2.0.0 milestone Mar 7, 2023
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It took a bit but I found it: this has been promised in a comment in #498. But what are two years between friends?

This was referenced Mar 7, 2023
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@czurnieden czurnieden force-pushed the extra_strong_lucas_test branch 3 times, most recently from 9765d5b to 6fbbc0e Compare April 4, 2023 17:29
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My implementation of the extra strong Lucas test has been successfully checked against all Miller-Rabin pseudoprimes to the base 2 up to 2^64.
Testcode in a gist. Comment contains links to the pseudoprime lists.

@czurnieden czurnieden mentioned this pull request Apr 5, 2023
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@czurnieden czurnieden force-pushed the extra_strong_lucas_test branch 2 times, most recently from e34d96f to d2b62d4 Compare April 11, 2023 19:32
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There are many preprocessor branches now in mp_prime_is_prime.c. Add a line or two to the CI to check the branch LTM_USE_ONLY_MR?

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The generated SPRP tables including their factoring (used to compute some of the limits here) is in the new repository SPRPs.

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There are no changes of the API directly but the Frobenius-Underwood test is an addition to the Extra-Strong-Lucas test now, instead of an alternative. If that is not seen as a problem we could merge it now instead of later (version 2).

Oh, and I found a bit of an unrelated mess in the documentation and fixed it here instead of a separate PR. Drop me a note if you[1] want a separate PR.

[1] "You"? Who is "you"? Y'all, of course! ;-)

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Overhaul of the prime-tests
681dc56 
 - Removal of the Fermat test mp_prime_fermat
 - Replacement of the Strong Lucas-Selfridge test with the
   Extra Strong Lucas test with Robert Baillie's parameters
   P = 3 and Q = 1
 - Finer grained early-outs
 - All determistic tests < 2^64 empirically verified
 - Additional tests to check the implementations of the
   Miller-Rabin and Extra Strong Lucas tests
 - Addition of tests of the LTM_USE_ONLY_MR to the CI
 - Documentation update
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