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Forum: XYYXF Project 2021-11-06, 02:51
Replies: 480
Views: 105,803
Posted By pxp
I have now finished testing the Leyland numbers...

I have now finished testing the Leyland numbers in the interval from L(300999,10) to L(301999,10) and have found therein 12 PRPs. Next interval is L(301999,10) - L(302999,10).
Forum: XYYXF Project 2021-09-12, 09:33
Replies: 480
Views: 105,803
Posted By pxp
100263^98600+98600^100263,500702 If you...

100263^98600+98600^100263,500702

If you haven't already done so, you should submit this to PRPTop, here (http://www.primenumbers.net/prptop/submit.php).
Forum: XYYXF Project 2021-09-08, 14:52
Replies: 480
Views: 105,803
Posted By pxp
Largest Leyland Prime Hunt

In fact, I found two new primes in that interval:

<386642> Jun 2021 L(81650,54369)
<386561> Aug 2021 L(80565,62824) new
<386548> Aug 2021 L(83747,41272) new
<386434> May 2014 ...
Forum: XYYXF Project 2021-08-15, 12:37
Replies: 480
Views: 105,803
Posted By pxp
I'm done. In addition to Anatoly Selevich's...

I'm done. In addition to Anatoly Selevich's L(314738,9), I found 16 new primes. The two-and-a-half months was pretty close. So to get up to 305000 decimal digits (which is on my schedule) will take...
Forum: XYYXF Project 2021-07-06, 15:40
Replies: 480
Views: 105,803
Posted By pxp
I will update my table...

I will update my table (http://chesswanks.com/num/a094133.txt) as your results come in.
Forum: XYYXF Project 2021-06-10, 21:45
Replies: 480
Views: 105,803
Posted By pxp
Since I am no longer using the final column of my...

Since I am no longer using the final column of my Leyland prime indexing chart (http://chesswanks.com/num/a094133.txt) to indicate intervals, I've added a "P" therein for entries that I know are...
Forum: XYYXF Project 2021-06-09, 10:28
Replies: 480
Views: 105,803
Posted By pxp
I have examined all Leyland numbers in the two...

I have examined all Leyland numbers in the two gaps between L(49413,580) <136550>, #2485, and L(49878,755) <143547> and found 123 new primes. That makes L(49878,755) #2610 and advances the index to...
Forum: XYYXF Project 2021-06-01, 15:50
Replies: 480
Views: 105,803
Posted By pxp
As my search of interval #22 winds down (ten or...

As my search of interval #22 winds down (ten or so day to go), I started (yesterday) the interval from L(299999,10) to L(300999,10). A preliminary estimate suggests that this will require some...
Forum: XYYXF Project 2021-04-30, 00:51
Replies: 480
Views: 105,803
Posted By pxp
I have examined all Leyland numbers in the four...

I have examined all Leyland numbers in the four gaps between L(44541,746) <127955>, #2339, and L(49205,532) <134129> and found 99 new primes. That makes L(49205,532) #2442 and advances the index to...
Forum: XYYXF Project 2021-03-27, 14:38
Replies: 480
Views: 105,803
Posted By pxp
I have examined all Leyland numbers in the seven...

I have examined all Leyland numbers in the seven gaps between L(48694,317) <121787>, #2221, and L(44541,746) <127955> and found 111 new primes. That makes L(44541,746) #2339.

So much for my March...
Forum: XYYXF Project 2021-03-18, 19:39
Replies: 480
Views: 105,803
Posted By pxp
Leyland primes curve fit

I was curious about how many more new primes I was going to find in my current interval (#19) as well as the two subsequent ones (#20 & #22) so I decided to do a more formal calculation instead of my...
Forum: XYYXF Project 2021-03-11, 16:31
Replies: 480
Views: 105,803
Posted By pxp
I'm guessing that I have used pfgw64 on some 5...

I'm guessing that I have used pfgw64 on some 5 million Leyland numbers since I started using it back in early July of last year. This is the first error encountered (this morning) using it:

Expr =...
Forum: XYYXF Project 2021-03-01, 18:16
Replies: 480
Views: 105,803
Posted By pxp
I have examined all Leyland numbers in the eight...

I have examined all Leyland numbers in the eight gaps between L(45405,286) <111532>, #2070, and L(48694,317) <121787> and found 143 new primes. That makes L(48694,317) #2221.
Forum: XYYXF Project 2021-02-25, 21:38
Replies: 480
Views: 105,803
Posted By pxp
It looks like I overestimated this by a week or...

It looks like I overestimated this by a week or so. In fact, a couple of my processors have already finished their assigned ranges and I have wasted no time getting them started on interval #19.
Forum: XYYXF Project 2021-01-24, 17:34
Replies: 480
Views: 105,803
Posted By pxp
I have examined all Leyland numbers in the gap...

I have examined all Leyland numbers in the gap between L(144999,10) <145000> and L(145999,10) <146000> and found 7 new primes.

I started interval #18 yesterday. It may be another three days before...
Forum: XYYXF Project 2021-01-23, 00:39
Replies: 480
Views: 105,803
Posted By pxp
I have examined all Leyland numbers in the gap...

I have examined all Leyland numbers in the gap between L(49878,755) <143547> and L(144999,10) <145000> and found 20 new primes.
Forum: XYYXF Project 2021-01-07, 08:52
Replies: 480
Views: 105,803
Posted By pxp
Thank you. I had some wi-fi issues yesterday that...

Thank you. I had some wi-fi issues yesterday that interrupted the communication effort with my Mac-mini farm. In particular, one machine would not let me in over the network. In the past I have...
Forum: XYYXF Project 2020-12-31, 12:17
Replies: 480
Views: 105,803
Posted By pxp
I have examined all Leyland numbers in the gap...

I have examined all Leyland numbers in the gap between L(49205,532) <134129> and L(49413,580) <136550> and found 42 new primes.
Forum: XYYXF Project 2020-12-20, 16:56
Replies: 480
Views: 105,803
Posted By pxp
While I have you here, I've been wondering if you...

While I have you here, I've been wondering if you might prefer Sergey over Serge in my Leyland primes (http://chesswanks.com/num/a094133.txt) indexing effort. It's an easy fix.
Forum: XYYXF Project 2020-12-19, 22:43
Replies: 480
Views: 105,803
Posted By pxp
I have examined all Leyland numbers in the gap...

I have examined all Leyland numbers in the gap between L(145999,10) <146000> and L(146999,10) <147000> and found 17 new primes.

I am going to be doing intervals #23 and #24, postponing #18 until...
Forum: XYYXF Project 2020-12-18, 16:16
Replies: 480
Views: 105,803
Posted By pxp
47 is 40182, known since Nov 2014. Why is 27 a...

47 is 40182, known since Nov 2014. Why is 27 a zero?
Forum: XYYXF Project 2020-12-16, 11:25
Replies: 480
Views: 105,803
Posted By pxp
I have examined all Leyland numbers in the gap...

I have examined all Leyland numbers in the gap between L(146999,10) <147000> and L(147999,10) <148000> and found 12 new primes.
Forum: XYYXF Project 2020-11-18, 12:46
Replies: 480
Views: 105,803
Posted By pxp
I have examined all Leyland numbers in the four...

I have examined all Leyland numbers in the four gaps between L(222748,3) <106278>, #1986, and L(45405,286) <111532> and found 80 new primes. That makes L(45405,286) #2070.

That was interval #17....
Forum: XYYXF Project 2020-11-08, 04:05
Replies: 480
Views: 105,803
Posted By pxp
I have examined all Leyland numbers in the gap...

I have examined all Leyland numbers in the gap between L(147999,10) <148000> and L(148999,10) <149000> and found 11 new primes.
Forum: XYYXF Project 2020-11-04, 15:12
Replies: 480
Views: 105,803
Posted By pxp
Thanks for the heads-up. Occasionally my internet...

Thanks for the heads-up. Occasionally my internet service provider changes the number of my IP address. This happens rarely but without notice and since I access chesswanks.com...
Showing results 1 to 25 of 204

 
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