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Forum: Computer Science & Computational Number Theory 2020-12-16, 07:24
Replies: 50
Views: 17,415
Posted By dbaugh
Using Kim Walisch's primecount program, here is...

Using Kim Walisch's primecount program, here is an additional power of two:

π(292) = 78908656317357166866404346
Forum: Computer Science & Computational Number Theory 2020-11-06, 22:02
Replies: 50
Views: 17,415
Posted By dbaugh
Using Kim Walisch's primecount program, here is...

Using Kim Walisch's primecount program, here is an additional power of two:

π(291) = 39895115987049029184882256
Forum: Computer Science & Computational Number Theory 2020-10-08, 05:44
Replies: 50
Views: 17,415
Posted By dbaugh
Using Kim Walisch's primecount program, here are...

Using Kim Walisch's primecount program, here are some additional powers of two:

π(287) = 2610087356951889016077639
π(288) = 5159830247726102115466054
π(289) = 10201730804263125133012340
π(290)...
Forum: Computer Science & Computational Number Theory 2020-08-30, 10:04
Replies: 34
Views: 18,342
Posted By dbaugh
New prime counting function record, pi(10^28)

I am happy to announce that Kim Walisch and I have computed the number of primes below 10^28, the result is:

pi(10^28) = 157,589,269,275,973,410,412,739,598

The computation was performed using...
Forum: Computer Science & Computational Number Theory 2018-08-19, 06:54
Replies: 34
Views: 18,342
Posted By dbaugh
Ditto for Idesnogu post. Please get Walisch's...

Ditto for Idesnogu post. Please get Walisch's primecount from GitHub and make some records.

To add to A059305 you will need to calculate pi(2^89).

To add to A007053 you will need to calculate...
Forum: Computer Science & Computational Number Theory 2016-06-01, 00:22
Replies: 34
Views: 18,342
Posted By dbaugh
result verified

Last December Kim Walisch and I started a verification run of pi(1e27) using different initial conditions. Kim completed the last piece of the verification calculation of pi(1e27) on May 31, 2016 at...
Forum: Lounge 2016-03-20, 03:57
Replies: 133
Views: 7,850
Posted By dbaugh
Arrived 19MAR2016. The current one was a bit...

Arrived 19MAR2016.

The current one was a bit dimpled from crushing but, I am happy to have them.

Thanks so much.
Forum: PrimeNet 2016-03-09, 08:04
Replies: 151
Views: 12,208
Posted By dbaugh
There is also the issue of skipped bit...

There is also the issue of skipped bit sub-levels. If one is doing TF on an exponent in say 2^68 to 2^69 and has it set to bail out if a factor is found, then that exponent has not truly been fully...
Forum: Lounge 2016-02-13, 23:42
Replies: 133
Views: 7,850
Posted By dbaugh
ADDRESS VERIFIED: YES MISSING: M30402457 &...

ADDRESS VERIFIED: YES
MISSING: M30402457 & M32582657
PACKAGED: YES
SENT: 17 MAR
RECEIVED: 19 MAR
Forum: News 2016-02-05, 05:39
Replies: 631
Views: 72,447
Posted By dbaugh
+1 for pins They give top producers a...

+1 for pins

They give top producers a tangible sense of having been part of the discovery.
Forum: News 2016-01-23, 09:37
Replies: 631
Views: 72,447
Posted By dbaugh
Curtis has done over 500 times as much GIMPS LL...

Curtis has done over 500 times as much GIMPS LL work as I have. As a consequence it is very unlikely that I will find a Mersenne prime before he finds his next one. It is also likely that the...
Forum: PrimeNet 2016-01-23, 02:20
Replies: 151
Views: 12,208
Posted By dbaugh
What happens to the exponent status history when...

What happens to the exponent status history when a factor is found in a bit level that had been reported as no factor in that range by TF?
Forum: PrimeNet 2016-01-18, 01:11
Replies: 41
Views: 3,794
Posted By dbaugh
I am not sure but, it looks like I submitted some...

I am not sure but, it looks like I submitted some TF results out of bit order. PrimeNet accepted some of the out of bit order work and then broke the exponent. Since I had turned in the work I had...
Forum: PrimeNet 2016-01-17, 08:03
Replies: 41
Views: 3,794
Posted By dbaugh
Here is a list of problem exponents: ...

Here is a list of problem exponents:

120171761
120171823
120172007
120172009
120172061
120172109

I expect it to grow with my next submission if nothing is done to fix the problem.
Forum: PrimeNet 2016-01-16, 22:05
Replies: 41
Views: 3,794
Posted By dbaugh
What bothers me is that this is not a legacy...

What bothers me is that this is not a legacy situation. These skipped bit levels are being introduced today for no good reason. Who needs to investigate this?
Forum: PrimeNet 2016-01-16, 20:35
Replies: 41
Views: 3,794
Posted By dbaugh
A lot of work was done to fill in missed bit...

A lot of work was done to fill in missed bit levels and now new ones are being introduced.
Forum: PrimeNet 2016-01-16, 19:31
Replies: 41
Views: 3,794
Posted By dbaugh
I tried to submit: no factor for M120172061...

I tried to submit:

no factor for M120172061 from 2^73 to 2^74 [mfaktc 0.21 barrett76_mul32_gs]

And got:

processing: TF no-factor for M120172061 (2^73-2^74)

Error code: 40, error text: TF...
Forum: PrimeNet 2016-01-16, 19:25
Replies: 41
Views: 3,794
Posted By dbaugh
WhattheTF

I requested a TF assignment and got the following:

Factor=4C7AA829E5371BA458897C8B9AC0129A,120171761,72,73

I submitted my results:

no factor for M120171761 from 2^72 to 2^73 [mfaktc 0.21...
Forum: PrimeNet 2016-01-01, 19:11
Replies: 18
Views: 960
Posted By dbaugh
It is nice to know that it all evens out in the...

It is nice to know that it all evens out in the end. I think what axn is asking is, given an exponent and it's factor, what is the formula for calculating the credit?
Forum: PrimeNet 2015-12-31, 18:55
Replies: 18
Views: 960
Posted By dbaugh
I calculated the classes for my factors and saw...

I calculated the classes for my factors and saw no correlation between class size and credit awarded.
Forum: PrimeNet 2015-12-31, 07:33
Replies: 18
Views: 960
Posted By dbaugh
The results submission does not report the class...

The results submission does not report the class in which the factor was found. I would need a screen dump to know that.

[Tue Dec 01 23:08:10 2015]
M130691507 has a factor:...
Forum: PrimeNet 2015-12-31, 05:32
Replies: 18
Views: 960
Posted By dbaugh
I thought that searching by class just meant that...

I thought that searching by class just meant that there was not a one-to-one relationship of class size to factor size. The factors are not found necessarily in any order of size within a bit range.
Forum: PrimeNet 2015-12-31, 01:23
Replies: 18
Views: 960
Posted By dbaugh
Here is some of my data. It looks like each bit...

Here is some of my data. It looks like each bit range is treated differently when calculating credit. A 73 bit factor is worth about as much as a 73.5 bit factor. Only half of my 73 -> 74 bit...
Forum: PrimeNet 2015-12-30, 23:50
Replies: 18
Views: 960
Posted By dbaugh
the credit awarded seems incongruous

I received the following credit for my TF factor finds. Why is the middle sized factor the least credit by far?

Manual testing 131725927 F 2015-12-30 23:17 0.0 13919010013655121461081 8.1251 ...
Forum: PrimeNet 2015-12-18, 07:09
Replies: 23
Views: 1,773
Posted By dbaugh
Thank you. That is an extremely helpful answer. ...

Thank you. That is an extremely helpful answer. So If someone did 17,100 44M curves would 40D, 45D and 50D show done with a head start on 55D? I would not actually do the 44M curves before...
Showing results 1 to 25 of 118

 
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