POST LOTS AND LOTS AND LOTS OF PRIMES HERE - Page 74

Kosmaj · 2007-09-21, 04:04

From the 5th Drive:

273*2^742930-1 (223647 digits)

PatrickSchmeer · 2007-09-23, 06:50

7755*2^384196-1 (115659 digits)

Found on 2007 Sept. 22 at 21h37m UTC (search started at n = 330000).

7755*2^n-1 is also prime for n = 2, 3, 8, 10, 14, 17, 22, 29, 38, 47, 54, 55, 87, 96, 106, 175, 204, 224, 232, 321, 380, 444, 446, 539, 567, 729, 776, 825, 1014, 1022, 1135, 1367, 1476, 1622, 1962, 1998, 2184, 2323, 2747, 4675, 4914, 5119, 6317, 6534, 6558, 6687, 6874, 7015, 7252, 7755, 8088, 8795, 10520, 10524, 15931, 17967, 18789, 20034, 22588, 28016, 28834, 30257, 31299, 37547, 38815, 55695, 60844, 66578, 66578, 73814, 74030, 78470, 84996, 85340, 96295, 133755 (checked to n = 143121 so far).

Kosmaj · 2007-09-23, 07:14

Congrats on your first prime on the list of Top-5000 largest primes, and welcome to RPS!

amphoria · 2007-09-23, 17:47

52654604145*2^457564-1 (137752 digits)

gd_barnes · 2007-09-24, 16:42

2145*2^345415-1 is prime (103984 digits)

VBCurtis · 2007-09-26, 04:53

201*2^775453-1 is prime (233437 digits).
-Curtis

Kosmaj · 2007-09-26, 05:09

Nice prime! Much better than those at 600k you were looking for...

kar_bon · 2007-09-26, 12:47

David Broadhurst found 137*2^1849238-1 to be prime (actually in test at Top5000).

he's searching for k=137 and 137137. see his bio-page http://primes.utm.edu/bios/page.php?id=231.
so Cruelty should contact him?!

Cruelty · 2007-09-26, 13:11

I am trying to reach him to verify what ranges he has tested. However I am a little bit sad right now, as I've spent some time on sieving it till 37T

amphoria · 2007-09-26, 19:51

20152491645*2^460155-1 (138531 digits)

gd_barnes · 2007-10-05, 22:42

3545685*2^349477-1 is prime (105210 digits)

2007-09-23, 06:50	#805
PatrickSchmeer Nov 2006 Saarbruecken, Germany 2×3×17 Posts	My first top-5000 prime 77552^384196-1 (115659 digits) Found on 2007 Sept. 22 at 21h37m UTC (search started at n = 330000). 77552^n-1 is also prime for n = 2, 3, 8, 10, 14, 17, 22, 29, 38, 47, 54, 55, 87, 96, 106, 175, 204, 224, 232, 321, 380, 444, 446, 539, 567, 729, 776, 825, 1014, 1022, 1135, 1367, 1476, 1622, 1962, 1998, 2184, 2323, 2747, 4675, 4914, 5119, 6317, 6534, 6558, 6687, 6874, 7015, 7252, 7755, 8088, 8795, 10520, 10524, 15931, 17967, 18789, 20034, 22588, 28016, 28834, 30257, 31299, 37547, 38815, 55695, 60844, 66578, 66578, 73814, 74030, 78470, 84996, 85340, 96295, 133755 (checked to n = 143121 so far). Last fiddled with by PatrickSchmeer on 2007-09-23 at 07:28

2007-09-23, 07:14	#806
Kosmaj Nov 2003 2×1,811 Posts	Patrick Congrats on your first prime on the list of Top-5000 largest primes, and welcome to RPS!

2007-09-24, 16:42	#808
gd_barnes May 2007 Kansas; USA 3²×13×89 Posts	21452^345415-1 is prime (103984 digits) Last fiddled with by gd_barnes on 2007-09-24 at 17:00*

2007-09-26, 05:09	#810
Kosmaj Nov 2003 E26₁₆ Posts	Curtis Nice prime! Much better than those at 600k you were looking for...

2007-09-26, 12:47	#811
kar_bon Mar 2006 Germany 2²·727 Posts	new prime for k=137 David Broadhurst found 137*2^1849238-1 to be prime (actually in test at Top5000). he's searching for k=137 and 137137. see his bio-page http://primes.utm.edu/bios/page.php?id=231. so Cruelty should contact him?!

2007-09-21, 04:04	#804
Kosmaj Nov 2003 2×1,811 Posts	From the 5th Drive: 273*2^742930-1 (223647 digits)

2007-09-23, 17:47	#807
amphoria "Dave" Sep 2005 UK 2³·347 Posts	52654604145*2^457564-1 (137752 digits)

2007-09-26, 04:53	#809
VBCurtis "Curtis" Feb 2005 Riverside, CA 4873₁₀ Posts	201*2^775453-1 is prime (233437 digits). -Curtis

2007-09-26, 13:11	#812
Cruelty May 2005 2³·7·29 Posts	I am trying to reach him to verify what ranges he has tested. However I am a little bit sad right now, as I've spent some time on sieving it till 37T

2007-09-26, 19:51	#813
amphoria "Dave" Sep 2005 UK 2³·347 Posts	20152491645*2^460155-1 (138531 digits)

2007-10-05, 22:42	#814
gd_barnes May 2007 Kansas; USA 3²×13×89 Posts	3545685*2^349477-1 is prime (105210 digits)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
POST LOTS AND LOTS OF PRIMES HERE	Kosmaj	Riesel Prime Search	1966	2021-06-27 11:11
Inefficient behaviour in yafu when doing large NFS with lots of threads	2147483647	YAFU	3	2016-12-25 21:44
Lots of roundoff errors	TheMawn	Software	18	2014-08-16 03:54
lots of large primes	Peter Hackman	Factoring	2	2008-08-15 14:26
How do I get computer to do lots of little tasks?	jasong	Information & Answers	4	2007-10-04 20:40