mersenneforum.org Post small primes and tell us about your progress here
 User Name Remember Me? Password
 Register FAQ Search Today's Posts Mark Forums Read

 2006-01-25, 11:06 #67 grobie     Sep 2005 Raleigh, North Carolina 337 Posts Choose your own k: k=1222853775 This makes 124 primes < 200k 1222853775 184373 1222853775 184993 progress: box#1 testing n=o to 250k currently at 197277 with 124 primes box#2 testing n=250 to 300k currently at 270553 with 2 primes Total 126 Primes
 2006-01-26, 17:48 #68 ValerieVonck     Mar 2004 Belgium 33×31 Posts 360949875*2^69027 - 1 is prime! 20788 digits 360949875*2^70726 - 1 is prime! 21300 digits 360949875*2^79219 - 1 is prime! 23856 digits Makes 96 primes!
 2006-02-01, 17:29 #69 ValerieVonck     Mar 2004 Belgium 33·31 Posts 360949875*2^107774 - 1 is prime! 32452 digits 360949875*2^111307 - 1 is prime! 33516 digits Makes 98 primes!
 2006-02-02, 20:30 #70 amphoria     "Dave" Sep 2005 UK 2×19×73 Posts Primes of k=5169615 < n=210000 All the primes of k=5169615 less than n=210000. This k is interesting in that primes are relatively sparse between n=10k and n=100k, but there are quite a few between n=100k and n=200k. Code: 5169615 1 5169615 5 5169615 9 5169615 14 5169615 21 5169615 24 5169615 26 5169615 27 5169615 32 5169615 41 5169615 48 5169615 51 5169615 55 5169615 56 5169615 59 5169615 65 5169615 68 5169615 85 5169615 97 5169615 99 5169615 127 5169615 149 5169615 174 5169615 199 5169615 207 5169615 270 5169615 275 5169615 336 5169615 346 5169615 351 5169615 420 5169615 525 5169615 526 5169615 537 5169615 564 5169615 598 5169615 627 5169615 631 5169615 659 5169615 701 5169615 822 5169615 900 5169615 982 5169615 1182 5169615 1289 5169615 1398 5169615 1417 5169615 1466 5169615 1478 5169615 1522 5169615 1776 5169615 2033 5169615 2108 5169615 2144 5169615 2435 5169615 2511 5169615 3471 5169615 3649 5169615 3705 5169615 3786 5169615 3910 5169615 4181 5169615 4618 5169615 5225 5169615 5281 5169615 5285 5169615 5451 5169615 6199 5169615 7112 5169615 7163 5169615 8026 5169615 8677 5169615 11093 5169615 12178 5169615 12582 5169615 15567 5169615 18234 5169615 19368 5169615 24761 5169615 31441 5169615 34229 5169615 39920 5169615 49932 5169615 62435 5169615 86969 5169615 109368 5169615 114065 5169615 121166 5169615 122409 5169615 122865 5169615 131241 5169615 134948 5169615 138531 5169615 146297 5169615 146505 5169615 154275 5169615 158790 5169615 158802 5169615 175677 5169615 183408 5169615 186027 5169615 186357 5169615 199712 5169615 207884 Last fiddled with by amphoria on 2006-02-02 at 20:32
 2006-02-03, 21:40 #71 Kosmaj     Nov 2003 2·1,811 Posts This one is not so small, but it was not enough for Top-5000. 445419975*2^203536-1 (61280 digits) I found it back in October but I think I never told anybody about it
 2006-02-06, 11:09 #72 grobie     Sep 2005 Raleigh, North Carolina 337 Posts k=1222853775 Choose your own k: k=1222853775 This makes 129 primes 1222853775 210992 progress: box#1 testing n=o to 250k currently at 231177 with 126 primes box#2 testing n=250 to 300k currently at 293245 with 3 primes Total 129 Primes
 2006-02-09, 18:35 #73 amphoria     "Dave" Sep 2005 UK 2×19×73 Posts k=317372055 From choose your own k: 317372055 53955 317372055 62185 317372055 63635 317372055 84815 This makes 100 primes for this k. The other 96 for n < 50k were found by Larry.
 2006-02-12, 15:58 #74 ValerieVonck     Mar 2004 Belgium 33·31 Posts k = 360949875 360949875*2^114960 - 1 is prime! 34615 digits Makes 99 primes!
 2006-02-12, 15:59 #75 ValerieVonck     Mar 2004 Belgium 33×31 Posts k = 234686595 234686595*2^119958 - 1 is prime! 36120 digits 234686595*2^123788 - 1 is prime! 37273 digits Makes 102 primes!
 2006-02-19, 10:47 #76 ValerieVonck     Mar 2004 Belgium 33×31 Posts k= 360949875 360949875*2^132482 - 1 is prime! 39890 digits Makes 100 primes!
 2006-03-01, 19:41 #77 amphoria     "Dave" Sep 2005 UK 2×19×73 Posts k=317372055 The remaining primes for this k that did not make it into the Top-5000. 317372055 91950 317372055 94270 317372055 139077 317372055 144290 317372055 149461 317372055 159253 317372055 168581 317372055 181167 317372055 185656 317372055 191704 That makes 110 primes less than 200k, but only two found between 200k and 300k.

 Similar Threads Thread Thread Starter Forum Replies Last Post pinhodecarlos NFS@Home 8 2018-11-28 13:45 mickfrancis Factoring 2 2016-05-06 08:13 robert44444uk Sierpinski/Riesel Base 5 358 2008-12-08 16:28 Housemouse Math 2 2008-06-04 05:23 TTn 15k Search 415 2006-03-02 21:17

All times are UTC. The time now is 18:03.

Fri Nov 27 18:03:05 UTC 2020 up 78 days, 15:14, 4 users, load averages: 1.89, 1.53, 1.31