Bug 99.99% - Page 4

Mysticial · 2016-11-06, 02:56

I'm mildly amused by this...

There are only a handful of known Mersenne Primes after many years of searching. Did you really think finding another one is as easy as letting a computer sit for 7 days?

paulunderwood · 2016-11-06, 02:56

Quote:

Originally Posted by Ruicar

i have a mersene pryme??

No

Ruicar · 2016-11-06, 03:03

i want only one i can get and a new start not a thing have happen a beautiful number

Ruicar · 2016-11-06, 03:05

you tell me i have to talk with and administrator is true or not ??

Ruicar · 2016-11-06, 03:08

not cool with me i was on it and reaching 99.99 i was sure but ok i try i was closed very closed

paulunderwood · 2016-11-06, 03:08

You have a choice:

1. let things happen automatically: Marry you account details.

2. Do things manually: use http://www.mersenne.org/manual_result/

Ruicar · 2016-11-06, 03:09

if he reach 99.99 is not product by 2 primes?

paulunderwood · 2016-11-06, 03:09

Quote:

Originally Posted by Ruicar

you tell me i have to talk with and administrator is true or not ??

If you follow the instructions then this is not necessary.

Ruicar · 2016-11-06, 03:11

what is the true ? what is marry account ? and why result manually i have sen 10 time?

Ruicar · 2016-11-06, 03:16

whats happens please tell me i don't understand its late here

paulunderwood · 2016-11-06, 03:22

Quote:

Originally Posted by Ruicar

if he reach 99.99 is not product by 2 primes?

The LL (Lucas-Lehmer) test works like this. Start with 4. The square and subtract 2: 4^2-2 = 14. Next take the result, 14, square it and subtract 2: 14^2-2 = 194. Repeat this s <- s^2-2 millions of times. When the number gets too big we can reduce it by the candidate number, so that the numbers we are dealing with are manageable.

Here is an example. M7 = 127. We do 5 iterations of LL:

14
194
37634
1416317954
2005956546822746114

As you can see the numbers get very big quickly. So in practice we look only at the remainders when divided by 127. In fact, we always look at only the remainders, noting for example 67^2-2 mod 127 is 42:

14
67
42
111
0

Bingo! The result of the 5th iteration is 0.

It says nothing about the number of factors, apart from it 1 when prime and greater than 1 when it is not prime.

2016-11-06, 02:56	#34
Mysticial Sep 2016 101001110₂ Posts	I'm mildly amused by this... There are only a handful of known Mersenne Primes after many years of searching. Did you really think finding another one is as easy as letting a computer sit for 7 days? Last fiddled with by Mysticial on 2016-11-06 at 02:59

2016-11-06, 03:03	#36
Ruicar Nov 2016 43 Posts	i want only one i can get and a new start not a thing have happen a beautiful number

2016-11-06, 03:05	#37
Ruicar Nov 2016 43 Posts	you tell me i have to talk with and administrator is true or not ??

2016-11-06, 03:08	#38
Ruicar Nov 2016 43 Posts	not cool with me i was on it and reaching 99.99 i was sure but ok i try i was closed very closed

2016-11-06, 03:08	#39
paulunderwood Sep 2002 Database er0rr 2·3²·11·19 Posts	You have a choice: 1. let things happen automatically: Marry you account details. 2. Do things manually: use http://www.mersenne.org/manual_result/

2016-11-06, 03:09	#40
Ruicar Nov 2016 53₈ Posts	if he reach 99.99 is not product by 2 primes?

2016-11-06, 03:11	#42
Ruicar Nov 2016 43₁₀ Posts	what is the true ? what is marry account ? and why result manually i have sen 10 time?

2016-11-06, 03:16	#43
Ruicar Nov 2016 2B₁₆ Posts	whats happens please tell me i don't understand its late here