Report top-5000 primes for k=1003-3000 - Page 56

gd_barnes · 2010-01-10, 02:22

2611*2^523299-1 is prime
2625*2^523524-1 is prime
2397*2^524086-1 is prime

Mini-Geek · 2010-01-13, 13:24

2563*2^525151-1 is prime!
I seem to have much better luck on NPLB than CRUS. I wonder if this is just chance or if there's something unknown about prime distribution on base 2 vs other bases...

mdettweiler · 2010-01-13, 16:51

Quote:

Originally Posted by Mini-Geek

2563*2^525151-1 is prime!
I seem to have much better luck on NPLB than CRUS. I wonder if this is just chance or if there's something unknown about prime distribution on base 2 vs other bases...

It's probably not so much about the base as it is about the fact that CRUS's k's are extremely biased towards the low-weight end of the spectrum: after all, there's a reason why they've held on as long as they have without a prime.

NPLB, on the other hand, is searching a very large contiguous k-range, which is quite ideal for finding lots of primes.

gd_barnes · 2010-01-16, 21:07

1731*2^667435-1 is prime
1875*2^667853-1 is prime

vaughan · 2010-01-19, 05:31

1879*2^668517-1 is prime. Found by my little ASUS eeePC 701

henryzz · 2010-01-19, 16:22

Quote:

Originally Posted by vaughan

1879*2^668517-1 is prime. Found by my little ASUS eeePC 701

impressive for such a slow pc

gd_barnes · 2010-01-21, 05:49

2223*2^525476-1 is prime
2643*2^525528-1 is prime
2715*2^525530-1 is confirmed prime
2691*2^525606-1 is prime
2717*2^526016-1 is prime
2829*2^526483-1 is prime
2941*2^526493-1 is confirmed prime
2183*2^527764-1 is prime
2537*2^528164-1 is prime

1549*2^669387-1 is prime

vaughan · 2010-01-29, 01:46

2445*2^528423-1 already in database

vaughan · 2010-01-29, 08:54

2429*2^528680-1 is prime

vaughan · 2010-01-29, 10:28

2575*2^528713-1 is prime

gd_barnes · 2010-01-30, 11:00

2379*2^529181-1 is prime
2259*2^529340-1 is prime
2067*2^529888-1 is prime
2533*2^531163-1 is prime
2993*2^531362-1 is prime
2397*2^531494-1 is prime
2543*2^531924-1 is prime
2395*2^532313-1 is prime

2010-01-10, 02:22	#606
gd_barnes May 2007 Kansas; USA 24233₈ Posts	26112^523299-1 is prime 26252^523524-1 is prime 23972^524086-1 is prime Last fiddled with by gd_barnes on 2010-01-12 at 08:15 Reason: add primes*

2010-01-16, 21:07	#609
gd_barnes May 2007 Kansas; USA 3³×5×7×11 Posts	17312^667435-1 is prime 18752^667853-1 is prime Last fiddled with by gd_barnes on 2010-01-18 at 03:17 Reason: add prime

2010-01-21, 05:49	#612
gd_barnes May 2007 Kansas; USA 3³×5×7×11 Posts	22232^525476-1 is prime 26432^525528-1 is prime 27152^525530-1 is confirmed prime 26912^525606-1 is prime 27172^526016-1 is prime 28292^526483-1 is prime 29412^526493-1 is confirmed prime 21832^527764-1 is prime 25372^528164-1 is prime 15492^669387-1 is prime Last fiddled with by gd_barnes on 2010-01-28 at 11:21 Reason: add primes

2010-01-30, 11:00	#616
gd_barnes May 2007 Kansas; USA 3³·5·7·11 Posts	23792^529181-1 is prime 22592^529340-1 is prime 20672^529888-1 is prime 25332^531163-1 is prime 29932^531362-1 is prime 23972^531494-1 is prime 25432^531924-1 is prime 23952^532313-1 is prime Last fiddled with by gd_barnes on 2010-02-05 at 06:15 Reason: add primes

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2010-01-13, 13:24	#607
Mini-Geek Account Deleted "Tim Sorbera" Aug 2006 San Antonio, TX USA 17×251 Posts	2563*2^525151-1 is prime! I seem to have much better luck on NPLB than CRUS. I wonder if this is just chance or if there's something unknown about prime distribution on base 2 vs other bases...

2010-01-19, 05:31	#610
vaughan Jan 2005 Sydney, Australia 5·67 Posts	1879*2^668517-1 is prime. Found by my little ASUS eeePC 701

2010-01-29, 01:46	#613
vaughan Jan 2005 Sydney, Australia 5·67 Posts	2445*2^528423-1 already in database

2010-01-29, 08:54	#614
vaughan Jan 2005 Sydney, Australia 5×67 Posts	2429*2^528680-1 is prime

2010-01-29, 10:28	#615
vaughan Jan 2005 Sydney, Australia 5×67 Posts	2575*2^528713-1 is prime