Report top-5000 primes for all k<=1001 - Page 132

mdettweiler · 2017-11-22, 20:10

Two primes from port 2000:

Added 124015 : 829*2^1484633-1 (446922 digits)
Added 124016 : 801*2^1486133-1 (447374 digits)

odicin · 2017-12-17, 22:07

Added 124064 : 339*2^2336421-1 (703336 digits)

mdettweiler · 2017-12-22, 21:26

Added 124076 : 683*2^1491446-1 (448973 digits)

MyDogBuster · 2018-01-06, 16:57

Added 124107

745*2^1494273-1 is prime 449824 digits

mdettweiler · 2018-01-22, 22:12

A couple primes that my machines piled up while I wasn't watching them too closely:

Added 124166 : 975*2^1493869-1 (449703 digits)
Added 124167 : 703*2^1494427-1 (449871 digits)

MyDogBuster · 2018-01-23, 14:48

Added 124170

855*2^1498084-1 (450972 digits)

MyDogBuster · 2018-01-24, 18:08

Added 124173 : 837*2^1498329-1 (451045 digits)

MyDogBuster · 2018-02-07, 16:05

Added 124285 :691*2^1500869-1 (451810 digits)

mdettweiler · 2018-02-10, 21:04

Looks like I just re-discovered a prime on port 2000 that was previously picked up by the Free-DC Prime Search eight years ago:

907*2^1501169-1

Does anyone know what ranges they searched in this area? My understanding is that they weren't intending to do a comprehensive search (just to find some primes), so we might be in for some hit-or-miss in the near future.

pinhodecarlos · 2018-02-10, 21:14

That has been an individual search by Burt not related with Free-DC drives, just the knowledge on the finding to FreeDC account.

gd_barnes · 2018-02-11, 05:19

See the first post of the 14th drive. There are only 2 more known primes after this one for k=600-1001 n=1.5M-2M. So you found a rarity.

The 13th drive has only one more known prime for k=400-600 n=1.5M-2M.

So not much hit-and-miss. :-)

2017-12-22, 21:26	#1444
mdettweiler A Sunny Moo Aug 2007 USA (GMT-5) 3×2,083 Posts	Added 124076 : 6832^1491446-1 (448973 digits) Last fiddled with by mdettweiler on 2017-12-22 at 21:26*

2018-02-07, 16:05	#1449
MyDogBuster May 2008 Wilmington, DE 2²·23·31 Posts	Added 124285 :6912^1500869-1 (451810 digits) Last fiddled with by MyDogBuster on 2018-02-07 at 16:15*

2018-02-11, 05:19	#1452
gd_barnes "Gary" May 2007 Overland Park, KS 13·907 Posts	See the first post of the 14th drive. There are only 2 more known primes after this one for k=600-1001 n=1.5M-2M. So you found a rarity. The 13th drive has only one more known prime for k=400-600 n=1.5M-2M. So not much hit-and-miss. :-) Last fiddled with by gd_barnes on 2018-02-11 at 05:39

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2017-11-22, 20:10	#1442
mdettweiler A Sunny Moo Aug 2007 USA (GMT-5) 3×2,083 Posts	Two primes from port 2000: Added 124015 : 8292^1484633-1 (446922 digits) Added 124016 : 8012^1486133-1 (447374 digits)

2017-12-17, 22:07	#1443
odicin Sep 2011 Potsdam, Germany 2·73 Posts	Added 124064 : 339*2^2336421-1 (703336 digits)

2018-01-06, 16:57	#1445
MyDogBuster May 2008 Wilmington, DE 2²×23×31 Posts	Added 124107 745*2^1494273-1 is prime 449824 digits

2018-01-22, 22:12	#1446
mdettweiler A Sunny Moo Aug 2007 USA (GMT-5) 3·2,083 Posts	A couple primes that my machines piled up while I wasn't watching them too closely: Added 124166 : 9752^1493869-1 (449703 digits) Added 124167 : 7032^1494427-1 (449871 digits)

2018-01-23, 14:48	#1447
MyDogBuster May 2008 Wilmington, DE 2852₁₀ Posts	Added 124170 855*2^1498084-1 (450972 digits)

2018-01-24, 18:08	#1448
MyDogBuster May 2008 Wilmington, DE 2²·23·31 Posts	Added 124173 : 837*2^1498329-1 (451045 digits)

2018-02-10, 21:04	#1450
mdettweiler A Sunny Moo Aug 2007 USA (GMT-5) 3×2,083 Posts	Looks like I just re-discovered a prime on port 2000 that was previously picked up by the Free-DC Prime Search eight years ago: 907*2^1501169-1 Does anyone know what ranges they searched in this area? My understanding is that they weren't intending to do a comprehensive search (just to find some primes), so we might be in for some hit-or-miss in the near future.

2018-02-10, 21:14	#1451
pinhodecarlos "Carlos Pinho" Oct 2011 Milton Keynes, UK 2³×641 Posts	That has been an individual search by Burt not related with Free-DC drives, just the knowledge on the finding to FreeDC account.