RES64: PRP vs. LLR
 

I'm pretty sure I read about it on this forum some time ago, but can't find it right now: are residues from PRP and LLR compatible? e.g. should I get the same RES64 after testing the same number with both programs?

For numbers of the form k*2^n+1, LLR performs a Proth test. For k*2^n-1, it performs a LLR test. For others it performs a PRP test (I don't know about the new Gaussian Mersenne norm thingie :rolleyes:).

So you'll see the LLR program produce three types of RES64:- Proth RES64, LLR RES64 and plain RES64. It is the last that would be compatible with RES64 produced by PRP.

I think the short answer is: NO :huh:

OK, so for the [I]k*2^n-1[/I], LLR RES64 <> RES64.
Thanks for the answer :tu:
I guess I could just :rtfm: LLR manual :blush: