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Forum: Viliam Furik

2021-04-11, 16:06

Replies: 14

Maybe useless but still interesting thing about LL sequence terms

Views: 2,135

Posted By Viliam Furik

Update

I have been trying to find something and came across the Wikipedia page for the LL test, where it says, that the sign of the S(p-3) is (-1)(p-1)/2 (except for p = 5), for starting value of 2/3, which...

Forum: Viliam Furik

2021-03-22, 17:18

Replies: 14

Maybe useless but still interesting thing about LL sequence terms

Views: 2,135

Posted By Viliam Furik

The pattern you observed is fairly trivial I...

The pattern you observed is fairly trivial I would say. If the prime exponent you're testing modulo p is itself a Mersenne prime, then you are testing the Mersenne prime with a smaller exponent. For...

Forum: Viliam Furik

2021-03-22, 17:12

Replies: 14

Maybe useless but still interesting thing about LL sequence terms

Views: 2,135

Posted By Viliam Furik

:jokedrum: Good one. :D

:jokedrum:

Good one. :D

Forum: Viliam Furik

2021-03-22, 14:41

Replies: 14

Maybe useless but still interesting thing about LL sequence terms

Views: 2,135

Posted By Viliam Furik

I think you confuse yourself with small and big...

I think you confuse yourself with small and big p/P.

S(P-2) is of no use to anyone, because P = 2^p-1. 2^P-1 is a pretty big number...

Could you please recalculate and rewrite? I think it's...

Forum: Viliam Furik

2021-03-22, 00:30

Replies: 14

Maybe useless but still interesting thing about LL sequence terms

Views: 2,135

Posted By Viliam Furik

What I want is to know whether there is some rule...

What I want is to know whether there is some rule for the value of X mod p. If we knew what would the remainder of X modulo p have to be assuming Mp is prime, then this would allow testing Mersenne...

Forum: Viliam Furik

2021-03-21, 15:53

Replies: 14

Maybe useless but still interesting thing about LL sequence terms

Views: 2,135

Posted By Viliam Furik

I agree it was not stated correctly. So let me...

I agree it was not stated correctly. So let me correct myself:

S(p-2) is congruent to X (mod p)

In the case of p = 5, X is congruent to 4 (mod p), which holds, because S(p-2) is also congruent...

Forum: Viliam Furik

2021-03-21, 15:06

Replies: 14

Maybe useless but still interesting thing about LL sequence terms

Views: 2,135

Posted By Viliam Furik

Maybe useless but still interesting thing about LL sequence terms

I was thinking about testing Mersenne numbers, not modulo Mp but modulo p. I realized that since Mp is prime if and only if S(p-2) in LL sequence is 0 (mod Mp), then we know the S(p-2) = X * Mp,...

Showing results 1 to 7 of 7

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