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Old 2021-01-07, 04:33   #1
tuckerkao
 
Jan 2020

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Default Found a Factor on my first P-1 Test

It was probably a pure luck that I found a factor during the stage 1 when factoring an exponent -
https://www.mersenne.org/report_expo...exp_hi=&full=1

I felt this number was a composite number at the beginning since there is a 3 of a kind(has to be an even number) for the digits when convert into the dozenal base: 2Ӿ71Ӿ5Ӿ7 and its ending digit is not 5, just to see whether Kriesel was right.

Last fiddled with by tuckerkao on 2021-01-07 at 04:39
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Old 2021-01-07, 06:33   #2
retina
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Quote:
Originally Posted by tuckerkao View Post
It was probably a pure luck that I found a factor during the stage 1 when factoring an exponent ...
It was definitely pure luck. No doubt about it. Doing base conversion into base-12 won't help you to determine if a number is prime or not.

Last fiddled with by retina on 2021-01-07 at 06:33
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Old 2021-01-07, 06:50   #3
Uncwilly
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Quote:
Originally Posted by tuckerkao View Post
I felt this number was a composite number at the beginning since
I have a feeling that every Mersenne number that you test (that is not an already known MP) will be composite. I have statistics on my side.

Last fiddled with by Uncwilly on 2021-01-07 at 06:54
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Old 2021-01-09, 11:39   #4
tuckerkao
 
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Hmmm, Ben Delo already tested this exponent, wondering who got him here?
https://www.mersenne.org/report_expo...exp_hi=&full=1
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Old 2021-01-14, 10:02   #5
LaurV
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you mean, like, half year ago?
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