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Old 2019-05-01, 20:29   #1420
lycorn
 
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Quote:
Originally Posted by axn View Post
Most likely these are being run using GMP-ECM.
That sounds (very) reasonable. It does not explain why he is not getting any credit, even for the factors found, though.
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Old 2019-05-02, 01:55   #1421
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Quote:
Originally Posted by lycorn View Post
It does not explain why he is not getting any credit, even for the factors found, though.
Maybe he doesn't care about credit on mersenne.org. I think the factors say enough.
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Old 2019-05-02, 05:41   #1422
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P-1 found a factor in stage #1, B1=695000.
UID: Jwb52z/Clay, M91311949 has a factor: 1679230184991897832914127 (P-1, B1=695000)

80.474 bits
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Old 2019-05-02, 05:43   #1423
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Quote:
Originally Posted by Thecmaster View Post
90901697 F-PM1 2019-04-20 17:20 0.0 Factor: 462195198223850274269081 / (P-1, B1=695000)

Where and how can you check bitlevel on a factor?
I don't have the link at this second, but if you google "GIMPS Factor Bit Depth Calculator" there's a page that comes up where you click to activvate a right hand menu through 3 dark black lines at the top right of the screen and you past the factor into that bottom space and click off of it, but don't make the box go away and it will show you the bit number.
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Old 2019-05-02, 10:54   #1424
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Quote:
Originally Posted by Jwb52z View Post
I don't have the link at this second, but if you google "GIMPS Factor Bit Depth Calculator" there's a page that comes up where you click to activvate a right hand menu through 3 dark black lines at the top right of the screen and you past the factor into that bottom space and click off of it, but don't make the box go away and it will show you the bit number.
That's literally any page on www.mersenne.ca, the bitsize calculator is at the bottom of the hamburger menu ≡.
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Old 2019-05-02, 14:22   #1425
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Quote:
Originally Posted by retina View Post
Maybe he doesn't care about credit on mersenne.org. I think the factors say enough.
It is perfectly possible, yes. But I would imagine that, independently of the user willingness for credit, the server would compute and display the corresponding amount whenever a completed work unit is received. This situation seems to indicate that, at least, the work done is not being submitted to the server in the same manner most users submit it.
And it is indeed a shame that the NF-ECM work (i.e. number of curves, if any) is not being recorded, for future reference.
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Old 2019-05-02, 22:14   #1426
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Quote:
Originally Posted by lycorn View Post
That sounds (very) reasonable. It does not explain why he is not getting any credit, even for the factors found, though.
I'm guessing this is because the factors are so large that they cause an overflow when the server tries to calculate how much credit to give. However, this wouldn't explain why there is a small amount of credit as opposed to no credit at all.
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Old 2019-05-03, 10:34   #1427
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Quote:
Originally Posted by Jwb52z View Post
I don't have the link at this second, but if you google "GIMPS Factor Bit Depth Calculator" there's a page that comes up where you click to activvate a right hand menu through 3 dark black lines at the top right of the screen and you past the factor into that bottom space and click off of it, but don't make the box go away and it will show you the bit number.
Python can also be coaxed to do this for you locally without needing an Internet connection or a browser.
Code:
python -c "x= 10819968927585403636958816179849566933560096066787125831 ;import math;print(math.log(x,2))"
Output:
Code:
182.819741575
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Old 2019-05-03, 10:43   #1428
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Quote:
Originally Posted by retina View Post
Python can also be coaxed to do this for you locally without needing an Internet connection or a browser.
Code:
python -c "x= 10819968927585403636958816179849566933560096066787125831 ;import math;print(math.log(x,2))"
Output:
Code:
182.819741575
or more puristic with bc (scale is for the number of decimal digits after the decimal point)

Code:
$ x=10819968927585403636958816179849566933560096066787125831; echo "scale=4; l($x)/l(2)" | bc -l
182.8320
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Old 2019-05-03, 10:51   #1429
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Quote:
Originally Posted by vebis View Post
or more puristic with bc (scale is for the number of decimal digits after the decimal point)

Code:
$ x=10819968927585403636958816179849566933560096066787125831; echo "scale=4; l($x)/l(2)" | bc -l
182.8320
That is less accurate.
Code:
x=6129982163463555433433388108601236734474956488734408704; echo "scale=4; l($x)/l(2)" | bc -l

182.0122
The answer should be exactly 182.0000
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Old 2019-05-03, 11:57   #1430
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Quote:
Originally Posted by retina View Post
That is less accurate.
Code:
x=6129982163463555433433388108601236734474956488734408704; echo "scale=4; l($x)/l(2)" | bc -l

182.0122
The answer should be exactly 182.0000
That's true, should have mentioned the scale is not only applied to the result.
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