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 2018-02-21, 07:25 #1 king   Feb 2018 32 Posts Test a Specific Exponent in Prime95. When it is 100% done, does it mean I find a new prime number? Test a Specific Exponent in Prime95. When it is 100% done, does it mean I find a new prime number? I guess it will beep a message this is a prime number?????? Thanks in advance! Last fiddled with by king on 2018-02-21 at 07:25
2018-02-21, 07:28   #2
retina
Undefined

"The unspeakable one"
Jun 2006
My evil lair

5,879 Posts

Quote:
 Originally Posted by king Test a Specific Exponent in Prime95. When it is 100% done, does it mean I find a new prime number?
Maybe. But most probably not. 100% simply means the end of the test. You won't know if it is prime or composite until the test has finished. The chance of it being prime is not very high.

2018-02-21, 07:30   #3
king

Feb 2018

32 Posts
i am just asking it will automatically tells it is a prime or not after 100%

i am simply asking it will automatically tells it is a prime or not after 100%?

and i said 100%.

Quote:
 Originally Posted by retina Maybe. But most probably not. 100% simply means the end of the test. You won't know if it is prime or composite until the test has finished. The chance of it being prime is not very high.

Last fiddled with by king on 2018-02-21 at 07:34

2018-02-21, 07:40   #4
retina
Undefined

"The unspeakable one"
Jun 2006
My evil lair

5,879 Posts

Quote:
 Originally Posted by king i am simply asking it will automatically tells it is a prime or not after 100%? and i said 100%.
Okay, yes it will. You will know immediately the result.

 2018-02-21, 15:02 #5 Uncwilly 6809 > 6502     """"""""""""""""""" Aug 2003 101×103 Posts 100010101110012 Posts The simple answer is -no-. The test that Prime95 is doing has to run all the way to the end before any answer is revealed. The answer can be Prime or Not Prime at the end. It has to get to 100% either way. Unlike simple tests like trying to find a factor, the Lucas-Lehmer test only gives a result at the end of all the work. If the residue is all zero, it is prime. The residue will only become zero at the end of the last step. There is no practical way to look at the residue before that and get the answer.
2018-02-21, 18:15   #6
VBCurtis

"Curtis"
Feb 2005
Riverside, CA

23·3·11·17 Posts

Quote:
 Originally Posted by Uncwilly The simple answer is -no-. .... There is no practical way to look at the residue before that and get the answer.
I don't think OP ever asked if the answer would be known before 100%. For OP's question, "will reaching 100% give me the answer of Prime! or notprime", the answer is yes.

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