Low Weight

This project is to find large primes on low weight candidates of the form k*2^n-1.

Started: August 20, 2004
Last update: Mar 22, 2007

Titan Primes found on this project:

            3817*2^218917-1 on Sep 2, 2004 Jocelyn Larouche
209826493*2^1071303-1 on Sep 21, 2004 Thomas Ritschel
          12791*2^308026-1 on Sep 30, 2004 Jocelyn Larouche
209826493*2^1140855-1 on Nov 16, 2004 Thomas Ritschel
  80857169*2^1251076-1 on Dec 12, 2004 Thomas Ritschel
          64387*2^243001-1 on Jan 5, 2005 Marcin Lipinski
          27253*2^370867-1 on Nov 17, 2005 Karsten Bonath
        399239*2^253688-1 on Mar 28, 2006 Michael Curtis
        411793*2^233819-1 on July 12, 2006 Ingmar Goudt

[x] working on it ... (x) Done to x by and is available

k is 10^3
M is 10^6
G is 10^9
T is 10^12

To get the sieve file k=3343: www.15k.org/Riesel/3343_ktest.txt

Any k with an entry in n's/1000 left but no sieve was sieved to 1G by Grobie.

Reserved Available Riesel Number

Some ranges might already be done to 1M. Please send any info to Michael Curtis.

k Reserved n's/1000 left sieve 1M
(p, n's left)		 sieve 2M
(p, n's left)		 n's prime
253 Kosmaj 3.923 done 1T, 3629 71, 1007, 27623 (1.149M Joss) [Kosmaj at 1.6M]
659 7.798 31G, 1555 800516 (800k rieselsieve)
2293 rieselsieve done
3343  SB2 4.297 113G, 2531 483, 1299 (410k Joss) [SB2 at 740k]
3817  SB2 4.932 43G, 3007 40381, 161197, 218917 (256k Joss) [SB2 at 739k]
4813  SB2 5.018 49G, 3850 515, 11379, 13155 (230k Joss) [SB2 at 541k]
5077  SB2 6.038 48G, 5748 117, 333 (227k Joss) [SB2 at 441k]
6119  SB2 4.599 95G, 2721 4544 (360k Joss) [SB2 at 599k]
6883 Joss 2.46 done 10M, 3711 39 [Joss at 1M]
7331 5.217 65G, 4054 34, 87154 (224k Joss)
9179 3.617 7.5G, 2550 4120, 10408, 41680 (295k Joss)
9613 6.463 17G, 4629 1479, 34239 (211k Joss)
9787  kar_bon 3.787 170G, 1428 13, 589, 913, 2893, 47209 (506k Joss) [kar_bon at 550k]
9913 3.695 18G, 2252 1187, 8387 (291k Joss)
10949 2.648 114G, 1374 10M, 4202 1492, 1516 (481k Joss)
11411 4.52 342G, 1906 34, 106, 154, 1570, 12706 (575k Ingmar)
11519 5.22 12G, 4094 164444 (216k Joss)
12791 2.237 138G, 1289 10M, 5610 2818, 29398, 308026 (627k Joss)
14459 Ingmar 7.22 64G, 4947 171144 [Ingmar at 360k]
17077 Joss 2.478 16.5G, 1837 10M, 3639 677 [Joss at 370k]
19919 6.471 2G, 5185 888, 2688, 8460, 170820 (179k Joss)
20141 kar_bon 5.847 done 30, 78 (203k Joss) [kar_bon at 1M]
20639 Ingmar 1.2G, 6232 948, 2668, 23084, 80788, 81300 [Ingmar at 335k]
21547 1.6G, 7287 121, 2233, 16001 (104k Joss)
21673 1.4G, 4048 7, 775, 129175 (168k Joss)
22183 100M, 6201 727, 2471 (30k Joss)
23437 Keller 3.034 7G, 3034 10M, 4225 337, 2317, 3829 (30k Joss) [Keller at ?]
23669 rieselsieve done
24067 1M, 10004 1753, 2069, 2881 (30k Joss)
24671 1M, 9458 1290, 2250, 11698 (30k Joss)
25229 3.06 26G, 2070 10M, 4415 238652 (Yves Gallot) (325k Joss)
26773 rieselsieve done
27253 kar_bon done (33k Joss) 370867 (L150) [kar_bon at 1M]
27791 Templus 3.234 1M, 5717 4654, 12262, 17038, 19750 (30k Joss) [Templus at 300k]
30727 1M, 9416 1121, 3353, 15929 (30k Joss)
31511 kar_bon done 278, 6398 (30k Joss) [kar_bon at 1M]
31859 rieselsieve done
32713 Marcin 1M, 9562 19, 4471, 10351 (30k Joss) 159151 [Marcin at 195k]
38473 rieselsieve done
38887 Marcin
43541 3.3G, 3308 (237k Joss)
46663 rieselsieve done
48703 amphoria 109415 [amphoria at 840k]
48973 2G, 2569 43, 115, 259, 32119 (100k Max)
49151 amphoria 97058 [amphoria at 600k]
50171 amphoria done 138 [amphoria at 1.5M]
50227  kar_bon 131M, 5851 11893 (31k Joss) [kar_bon at 521k]
51127 Max 25G 49, 73, 849, 4953, 6841, 35209 [Max at 404k]
53741 Joss done 1.95T,1247 4738 [Joss at 1.1M]
57943 kar_bon 1M, 5132 555, 15675, 52287, 62475, 76335 (30k Joss) [kar_bon at 531k]
63487 Marcin 245, 293, 117413, 136517 [Marcin at 304k]
64387 Marcin 40249, 243001 [Marcin at 288k]
65279 4.95 1640, 4952, 66632 (82k Joss)
67117 rieselsieve done
70079 2.437 42G, 2006 1428 (176k Joss)
71009 done 1185112 (1.18M rieselsieve)
74201 Marcin 46, 142, 2014 [Marcin at 335k]
74699 riseslsieve done
77711 Marcin 1218, 108930 [Marcin at 201k]
81041 rieselsieve done
84277 Marcin
85807 Marcin
93997 6.600 91G, 895 864401 (864k rieselsieve)
97139 rieselsieve done
106303 10G, 3323 1939 (127k Joss)
114613 15G, 3824 211, 1687 (40k Joss)
116531 Marcin 1M, 4503 59782 [Marcin at 304k]
117037 8G, 3314 1029 (30k Joss)
124679 12G, 2182 948, 2460, 10308 (84k Joss)
130139 58G, 1316 10M, 3361 280296 (g127) (411k Joss)
131069 Andrew 1.3G, 2839 16, 112 (50k Joss) (500k Andrew)
131707 VBCurtis done [Curtis at 1.8M]
132217 4.09 15281 (30k Joss)
132851 1M, 4782 1734, 12222, 25110 (30k Joss)
138847 Joss 0.767 done 3.3T, 379 33, 1283793 (1.4M Jean Penné) [Joss at 1.63M]
143047 rieselsieve done done
144337 lsoule 4.23 done [lsoule at 1M]
148901 4.52 (30k Joss)
150847 done 1076441 (rieselsieve)
152713 done 1154707 (rieselsieve)
161669 rieselsieve
167021 VBCurtis done [VBCurtis at 1.95M]
170591 4.905 2.7G, 653 866870 (866k rieselsieve)
171089 done (1M VBCurtis)
171607 1.648 58G, 915 21117, 73245 (410k Joss)
175211 done (1M VBCurtis)
177941 done 34, 154 (200k James, 1M gribozavr)
179743 50M, 3473 (30k Joss)
192089 done 1395688 (1.39M rieselsieve)
192509 1M, 4296 52 (30k Joss)
192971 rieselsieve done done
212893 3.70 730387 (rieselsieve)
216367 1M, 4067 1601, 5129, 28841 (35k Joss)
220033 10.140 200M, 2842 719731 (719k rieselsieve)
236377 1M, 7031
239857  SB2 1M, 8134 [SB2 at 427k]
245561 rieselsieve done (309k Joss, VBCurtis 1M)
246299 10.707 200M, 2649 752600 (752k rieselsieve)
248047  SB2 1M, 4423 [SB2 at 617k]
249127 1M, 7067
256453 2.35 done 607, 41359, 233779 (1M Grobie)
261221 6.829 200M, 2121 689422 (689k rieselsieve)
265423 4.08
273613 3.55
275591 1.767 18G, 1350 5354 (232k Joss)
278077 1M, 4311

278713

1M, 3399 17159 (32k Joss) 57719 (200k James)
279703 9.766 100M, 3748 616235 (616k rieselsieve)
279731 3.58
284579 2.94
294907 3.52
304207 rieselsieve
306251 SB2 [James at 534k]
309817 6.819 200M, 612 901173 (901k rieselsieve)
310867 4.32 381 (500k Cedric)
313979 3.08
320107  SB2 3.62 [SB2 at 592k]
323563 10M, 5173
327163 10M, 3206 167, 3047, 22151 (124k Joss)
332159 2.96
334147 SB2 3.73 [SB2 at 588k]
334331  SB2 2.55 [SB2 at 748k]
336839 rieselsieve
342337 1.394 21G, 923 1657 (337k Joss)
342847 rieselsieve
350107 done 1144101 (1.14M rieselsieve)
362737 3.899
370421 10M, 4240
384029 3.46
397027 rieselsieve done done
399239 done 32 (1M VBCurtis)
403993 1.230 done 29G, 1238 379 (405k Joss, 1M VBCurtis)
411793 Templus 35, 683, 9419, 233819 [Templus at 260k]
412717 done 1084409 (1.08M rieselsieve)
412843 4.45
434729 4.00
441907 10M, 5549
444637 Thomas done done none [Thomas at 2.3M]
451049 10M, 6423
458743 7.73 547791 (547k rieselsieve)
460139 8.822 100M, 1944 779536 (779k rieselsieve)
464353 3.98
464909 10M, 7035
465187 10M, 6444
469933 3.65
469949 rieselsieve done done (30k Joss)
473279 2.81
485557 rieselsieve done done (30k Joss)
487811 10M, 3350 (30k Joss)
491891 2.5G, 1377 5830 (251k Joss) ok
492787 10M, 7115
500621 done 1138519 (rieselsieve)
502541 done 1199930 (1.19M rieselsieve)
504613 done 1136459 (rieselsieve)
509203
516569 1.376 60G, 752 20 (448k Joss)
612509 2.26 (30k Joss)
643843 2.47
648433 3.000
671413 10M, 2965 (30k Joss)
685183 2.93
686711 3.57
700057 2.81
700477 2.59
762701
777149
780427 2.34
783073 2.31
784109 1.42 39G, 990 99884 (298k Joss)
790841
808477 10M, 4511 [SB2 at 407k]
842711 4.19
844559 10M, 5019
850931 Joss 1.48

20G, 973

 8966 [Joss at 344k]
866219 10M, 5272
893887 Joss 1.488 154G, 583 257 [Joss at 608k]
953429 2.54
961573 2.499
963643 1.084 161G, 737 none (335k Joss)
967597 1.84
981493 1.420 500M, 1420 (30k Joss)
992077
1002401 10M, 4745
1005449 10M, 4761
1005671 100M, 3851
1006469 10M, 3148
1011371 100M, 5324
1034503 2.09
1049917 done (1M Joss)
1106681
1145699 1.81
1180391 1.59
1208953 1.161 219G, 912 4007 (200k Joss)
1210421 2.04
1230877 10M, 5763
1234949 10M, 3905
1247173
1254341
1283759 2.56
1310437 2.39
1330207
1330319
1343021 2.739
1423139 9.5G, 1377 16980
1494299 1.99
1523369 2.05
1537649 2.69
1570927 2.087 20M, 2087
1580233 1.838 100M, 1838
1878839 20M, 1573
1926521 39G, 1006 (143k Joss)
2232007 done 1490605 (L4)
2308121 Thomas 0.631 75G, 287 (616k Joss)
2463547 2.04
2559419 2.86
2564279 100M, 1213
2686919 1.89
2693051 2.45
3189299 Joss 500G, 213 [Joss at 875k]
4254149 20M, 1583
4278899 Thomas 0.675 48G, 324 10M, 1036 13720 (520k Joss)
5112431 1.39
5619371 1.63
8288233 1.589 148699 (492k BotXXX)
8376239 20M, 1972
9096613 50M, 1757
9705763 Andrew done 49335 [Andrew at 1M]
9770317 0.660 done done 2205 (322k Joss) (2M VBCurtis)
10013593 1.33
10108837 1.69
10247561 1.17 [SB2 at 574k]
10284899 0.889
10296007 1.71
10346561 1.49 [SB2 at 707k]
10453199 0.674 (Templus 440k)
10463923 0.951
10544249 1.70
10598947 1.34
10639619 1.17
10671431 1.04
10805593 1.52
10813783 Templus 0.823 none [Templus at 780k]
10906603 1.19
10932097 1M, 2015
10943321 1M, 2666
11223059 0.843 260M, 843
11311003 0.784 81G, 576 (275k Joss)
11319193 1M, 2025
11468609 1M, 2025
11553221 10M, 1982
11639819 Templus 1.100 100M,1367 12 [Templus at 400k]
11658187 1M, 2297
11716993 1M, 2168
11741347 1M, 1945
11846279 1M, 2230
11847299 1M, 2209
11932211 100M,1326
11955659 Keller 1M, 1878 none
12192793 2.29
12254533 100M, 1352
12305981 100M, 1410
12334093 100M, 1758
12551291 1M, 2073
12695159 Marcin 0.691
12700769 10M, 2071
12753311 1M, 1908
12825793 1M, 2426
13277471 1M, 2518
13651423 1M, 2157
13768087 1M, 2231
13900807 VBCurtis 0.556 done done 9741 [VBCurtis at 2.4M]
14085941 100M, 1335
14321533 0.457 done 100G, 439 (1019k Joss)
14466883 1M, 1874
14533213 1M, 2135
14549347 1M, 2365
14745343 154M, 1198
14961487 Thomas 105G, 436 10M, 1113 (403k Joss)
15296681 209M, 1250
15364003 0.650 148G, 118 (818k Joss)
17481461 2.637
19009421 Marcin
19009979 Marcin none [Marcin at 332k]
19370947 Thomas done done 25 [Thomas at 2.27M]
19709699 460M, 897 10M, 1112
24186941 10M, 1796
24384313 done done (2M VBCurtis)
24814241 10M, 1864
26161207 Thomas 0.594 73G, 243 45G, 582 (591k Joss)
26503927 10M, 1153 10M, 1157
26946089 10M, 1939
27659053 10M, 1746
28077667 1.92 79305, 92145 (287k Marcin)
28161431 10M, 1800
28420897 10M, 1648
29899769 10M, 1959
32537227 Kosmaj 1T, 1280 [Kosmaj at 1.25M]
32703941 1.75
33118619 10M, 1660
33615761 10M, 1418
35873623 2.52
36231101 done (1M SB2)
37027019 10M, 1617
37616317 10M, 1551
37944761 10M, 1756
38279707 10M, 1674
38759233 10M, 1400
39123883 10M, 1773
40293059 Thomas 0.681 9.4G, 527 10M, 876 (226k Joss)
41343149 100M, 982 10M, 1128 (Grobie 475k)
42160421 2.269
56251213 Andrew 0.698 done 10M, 1043 551 [Andrew at 1.74M]
58352849 10M, 1900
59910449 Thomas done done 92 [Thomas at 2.27M]
80857169 Thomas done done 4, 1251076 [Thomas at 2.27M]
143316643 Thomas done done [Thomas at 2.27M]
162405629 Thomas done done 896, 12236 [Thomas at 2.27M]
175437131 Thomas done done [Thomas at 2.27M]
189030223 Thomas done done [Thomas at 2.27M]
203012861 Thomas done done 754 [Thomas at 2.27M]
209826493 Thomas done done 1071303, 1140855 [Thomas at 2.27M]
224371169 Thomas done done 3548 [Thomas at 2.27M]
243163663 Thomas done done 919087 [Thomas at 2.27M]
245265883 Thomas done done [Thomas at 2.27M]
260213857 Thomas done done [Thomas at 2.27M]
265831619 Thomas done done [Thomas at 2.27M]
276278983 Thomas done done 21623, 473423 [Thomas at 2.27M]
290851087 Thomas done done 57 [Thomas at 2.27M]
298095191 Thomas done done [Thomas at 2.27M]
300871183 Thomas done done [Thomas at 2.27M]
308120317 Thomas done done [Thomas at 2.27M]
308141737 Thomas done done 7517 [Thomas at 2.27M]
315940139 Thomas done done 8388, 595620 [Thomas at 2.27M]
326840893 Thomas done done 31 [Thomas at 2.27M]
331541563 0.773 48G, 374 10M, 1201 (516k Joss)
346308551 0.853 71G, 648 10M, 1285 (241k Joss)
346807897 1.033 15G, 688 10M, 1470 (292k Joss)
350399261 0.566 done 78G, 501 (1.1M Joss)
352668821 Joss 1.03 done 264G, 850 49910 [Joss at 1M]
352744289 kar_bon done 10M, 1929 [kar_bon at 1M]
353437897 kar_bon done 10M, 1660 9533 [kar_bon at 1M]
353442133 Marcin 10M, 1186 [Marcin at 336k]
353880067 kar_bon 0.594 done 200M, 823 (765k Joss) [kar_bon at 1M]
355268803 0.846 98G, 344 10M, 1256 (580k Joss)
355279961 40M, 1805
355281299 11M, 2679
380630849 Thomas done done [Thomas at 2.27M]
389152177 RPS done [RPS at 1.65M]
410314627 RPS done [RPS at 1.65M]
414322661 RPS done 2114 [RPS at 1.65M]
432043439 RPS done [RPS at 1.65M]
443200949 RPS done [RPS at 1.65M]
463395913 RPS done [RPS at 1.65M]
482987411 RPS done [RPS at 1.65M]
491362811 RPS done [RPS at 1.65M]
493412999 RPS done [RPS at 1.65M]
494660219 RPS done [RPS at 1.65M]
531115657 RPS done [RPS at 1.65M]
535224337 RPS done [RPS at 1.65M]
536864983 RPS done [RPS at 1.65M]
540196717 RPS done [RPS at 1.65M]
552455201 RPS done 25862 [RPS at 1.65M]
564510097 RPS done 11345 [RPS at 1.65M]
567143683 RPS done 4027 [RPS at 1.65M]
578625847 RPS done [RPS at 1.65M]
589877983 RPS done [RPS at 1.65M]
609937687 RPS done 1561 [RPS at 1.65M]
651488009 RPS done 156,10956 [RPS at 1.65M]
660879671 RPS done 702 [RPS at 1.65M]
673503191 RPS done [RPS at 1.65M]
691459721 RPS done [RPS at 1.65M]
713633533 RPS done [RPS at 1.65M]
725433403 RPS done [RPS at 1.65M]
738297163 RPS done [RPS at 1.65M]
759833699 RPS done [RPS at 1.65M]
792729463 4271, 24671 (330k Andrew)
801584081 RPS done 182 [RPS at 1.65M]
811064503 RPS done [RPS at 1.65M]
814419757 RPS done [RPS at 1.65M]
835596479 RPS done [RPS at 1.65M]
851324377 RPS done [RPS at 1.65M]
855686399 RPS done 162836 [RPS at 1.65M]
857656417 RPS done 4953 [RPS at 1.65M]
864316301 Cruelty done 30, 402 [Cruelty at 1M]
2147483647 Edorajh 2.820 [Edorajh at 500k]
29330981023 (600k Andrew)
59493015971 Thomas done done [Thomas at 4M]
1665624349782373 done (Citrix 1M)
10075614324682349 done (Citrix 1M)
12782924755172441 done (Citrix 1M)
15335906269828439 done (Citrix 1M)
23009979551311559 done (Citrix 1M)
30729699810869707 done (Citrix 1M)
41360993926068041 done (Citrix 1M)
49050506465852977 done (Citrix 1M)
49791527843569597 done (Citrix 1M)
50670759245200691 done (Citrix 1M)
72292129717621199 done (Citrix 1M)