17*2^n1
k=17 has been reported as continuously tested to n=205,000 but there are 5 more primes found for larger exponents [the largest for n=601158]. With respect to reported n_max, k=17 is by far the largest "hole" in the k<300 group. The intention of this project is to extend the range of tested and reported exponents and to find new primes. k=17, although not a multiple of 3, is a very highweight k and the probability of new primes for large n's is high. There is also a limited possibility of new primes for n<600k if some ranges were not checked, but there is no way to know.
Since about 3 weeks ago Templus has been sieving k=17 for [I]n[/I] in the 205k  2M range. The first block, n<300k sieved to 850bn is ready for testing. Please consider testing a file or two if you have an idle machine. Thank you. [B]Found primes[/B] 17*2^6053941 (182243 digits) by segmtfault on Sep 19, 2006 17*2^27218301 (819354 digits) by unconnected on Oct 17, 2010 17*2^29465841 (887012 digits) by pepi37 on May 20, 2013 [B]Status[/B] [CODE] [URL="http://kosmaj.sakura.ne.jp/rps/17/17_done.txt"]205,0002,695,000[/URL] RPS  Complete (1 new prime) 2,695,0002,800,000 unconnected  Complete (17*2^27218301 is prime!) 2,800,0002,840,000 Kosmaj  Complete 2,840,0002,900,000 unconnected  Complete 2,900,0002,916,000 RPS  Complete 2,916,0002,930,000 Kosmaj  Complete 2,930,0003,000,000 pepi37  Complete (17*2^29465841 is prime!) 3,000,0003,010,000 Kosmaj  Complete 3,010,0003,140,000 unconnected  Complete 3,140,0003,150,000 pepi37  Complete 3,150,0003,250,000 unconnected  Complete 3,250,0003,270,000 Kosmaj  Complete 3,270,0003,320,000 unconnected  Complete 3,320,0003,400,000 pepi37  Complete 3,400,0003,420,000 SectorX  Complete 3,420,0003,450,000 Carlos  Complete 3,450,0003,470,000 SectorX  Complete 3,470,0003,490,000 Carlos  Complete 3,490,0003,520,000 SectorX  Complete 3,520,0003.550,000 kracker  Complete 3,550,0003,570,000 SectorX  Complete 3,570,0003,640,000 unconnected  Complete 3,640,0004,000,000 Thomas11  Complete 4,000,0005,000,000 Batalov  Complete (17*2^41075441 is prime) [/CODE][B]Available Files [/B] Including all candidates in the 34M range, including already tested ones. Please help yourself by extracting the range you want to test. Extensively sieved by Psieve (latest update of August 19, 2013) [URL="http://kosmaj.sakura.ne.jp/rps/psieve/k17_3M.zip"]k17_3M.zip[/URL] (39353 candidates) FFT length of all tests: 192k. 
Known primes
17*2^n1 primes for following n's are already known. We'll confirm them as we proceed with tests.
[CODE] 211464 confirmed 310744 confirmed 310754 confirmed 429318 confirmed (grobie) 601158 confirmed (Kosmaj) [/CODE] 
I'm taking 250270 (2 files).

205250 complete, 17*2^2114641 confirmed prime, no other primes found.
Taking 270280. 
250270 complete, no primes found.

Taking 280290

280290 complete, no primes.
Taking 290300 
Uploading files in the 300350 range sieved to 1400bn.

290300 complete, no primes
Taking 300310 
Taking 310320.
Edit: 270280 complete, no primes. 
300310 complete, no primes.
Taking 320330 
All times are UTC. The time now is 11:44. 
Powered by vBulletin® Version 3.8.11
Copyright ©2000  2021, Jelsoft Enterprises Ltd.