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Old 2020-12-12, 03:03   #1
ONeil
 
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Minus Does this result elate that the number is not a Mersenne Prime?

Result:
NF-PM1 B1=728000


Is the above a residue which means the number is not a Mersenne Prime? Or just No Factor from some tested range?
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Old 2020-12-12, 03:23   #2
ONeil
 
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GIMPS NF-PM1 no factors by P-1 needs more testing
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Old 2020-12-12, 03:24   #3
Uncwilly
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That is not a residue. That is a result. Also it shows that you may not have given Prime95 enough memory. A B1 and no B2 looks not so good.

NF = No Factor found
That does not mean that the number is or is not a Mersenne Prime. And since you failed to include the exponent, it is hard to tell you much else.
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Old 2020-12-12, 03:25   #4
ONeil
 
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Also I'm running an LL on a number right now if it hits a Mersenne Prime will I get the credit by finding it even tho other people in the past tested it but left the number behind?
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Old 2020-12-12, 03:26   #5
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Quote:
Originally Posted by Uncwilly View Post
That is not a residue. That is a result. Also it shows that you may not have given Prime95 enough memory. A B1 and no B2 looks not so good.

NF = No Factor found
That does not mean that the number is or is not a Mersenne Prime. And since you failed to include the exponent, it is hard to tell you much else.

exponent

Last fiddled with by ONeil on 2020-12-12 at 04:04
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Old 2020-12-12, 04:02   #6
LaurV
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Quote:
Originally Posted by ONeil View Post
Also I'm running an LL on a number right now if it hits a Mersenne Prime will I get the credit by finding it even tho other people in the past tested it but left the number behind?
yes
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Old 2020-12-12, 04:03   #7
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Quote:
Originally Posted by LaurV View Post
yes
Thanks LaurV
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Old 2020-12-13, 13:14   #8
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Quote:
Originally Posted by ONeil View Post
exponent
I think the correct response would have been "the exponent". Or, you know, an actual numerical value for exponent.
Quote:
Originally Posted by ONeil View Post
Result:
NF-PM1 B1=728000

Is the above a residue which means the number is not a Mersenne Prime? Or just No Factor from some tested range?
Amazingly, the P-1 factoring result NF-PM1 B1=728000 means
no factor found, using P-1 factoring with B1=728000, and as such is inconclusive as to whether the Mersenne number on which the factoring was performed is prime or composite or Schrodinger.

Last fiddled with by kriesel on 2020-12-13 at 13:18
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Old 2020-12-13, 13:55   #9
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while a line like this
Code:
UID: firejuggler/Maison, M101186081 has a factor: 510212711686324010851111 (P-1, B1=729000)
is a definite proof it isn't
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Old 2020-12-13, 14:47   #10
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Quote:
Originally Posted by firejuggler View Post
while a line like this
Code:
UID: firejuggler/Maison, M101186081 has a factor: 510212711686324010851111 (P-1, B1=729000)
is a definite proof it isn't
(A verifiable factor is proof a number isn't prime) Except to a rare few: https://www.mersenneforum.org/showpo...0&postcount=79

Last fiddled with by kriesel on 2020-12-13 at 14:57
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Old 2020-12-13, 23:42   #11
Dr Sardonicus
 
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Quote:
Originally Posted by kriesel View Post
(A verifiable factor is proof a number isn't prime)
1 and the number itself are verifiable factors, regardless...
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