The Second Megabit Drive
 

We are starting the second megabit drive, featuring Ks between 100 and 200, and initially we are going to test the following 19 Ks from n=1M to n=1.1M:

k = 115, 117, 123, 129, 135, 147, 149, 153, 155,
157, 159, 171, 173, 175, 179, 183, 185, 189, 193

When we reach 1.1M we might replace some Ks.
Please help yourself and happy hunting! :smile:

[B]Update (June 19, 2015):[/B] Extending the drive beyond n=2M and adding the following 11 Ks: 131, 133, 137, 139, 141, 143, 145, 161, 177, 181, and 187.

[B]Update (March 20th, 2020):[/B] Removing k=193 from the drive to be searched by an individual.

[B]Status[/B]
[CODE]
Range of n Tested by Status
[URL="http://kosmaj.sakura.ne.jp/rps/megabit2/megabit2_done.txt"]1,000,000-1,700,000[/URL] - RPS - Complete (38 primes)
1,700,000-1,708,000 - Carlos - Complete (183*2^1707182-1 is prime)
1,708,000-1,720,000 - Carlos - Complete (175*2^1711779-1 is prime)
1,720,000-1,750,000 - kracker - Complete
1,750,000-1,762,000 - Carlos - Complete
1,762,000-1,780,000 - kracker - Complete (123*2^1779728-1 is prime)
1,780,000-1,830,000 - Thomas - Complete
1,830,000-1,838,000 - lsoule - Complete
1,838,000-1,900,000 - kracker - Complete
1,900,000-1,902,000 - lsoule/Carlos - Complete
1,902,000-1,950,000 - kracker - Complete (149*2^1945668-1 is prime)
1,950,000-1,952,000 - Kosmaj - Complete
1,952,000-1,980,000 - kracker - Complete
1,980,000-2,042,000 - Carlos - Complete (143*2^2007888-1 is prime)
2,042,000-2,054,000 - amphoria - Complete
2,054,000-2,056,000 - Kosmaj - Complete
2,056,000-2,068,000 - amphoria - Complete
2,068,000-2,070,000 - Kosmaj - Complete
2,070,000-2,094,000 - amphoria - Complete (159*2^2081069-1 is prime)
2,094,000-2,096,000 - Kosmaj - Complete
2,096,000-2,108,000 - amphoria - Complete
2,108,000-2,110,000 - Kosmaj - Complete
2,110,000-2,120,000 - amphoria - Complete (117*2^2117600-1 is prime)
2,120,000-2,170,000 - amphoria - Complete (185*2^2127966-1 is prime)
2,170,000-2,180,000 - amphoria - Complete (187*2^2172693-1 is prime)
2,180,000-2,200,000 - amphoria - Complete
2,200,000-2,202,000 - unconnected - Complete
[/CODE]
[B]Test Files[/B]
Extensively sieved by Psieve (the latest sieve file of July 31, 2011)

Attached is a file containing the list of candidates from n=2202k to 3000k. Note that it has not been broken into chunks so you will need to copy the first line into a file as well as the list of candidates you are searching.

Found Primes
 

115 [2]: 1141719, 1524183
117 [5]: 1104138, 1210282, 1302764, 1554601, 1618434
123 [3]: 1225115, 1241690, 1779728
129 [1]: 1376223
135 [1]: 1288177
143 [1]: 2007888
147 [3]: 1273684, 1374216, 1499333
149 [4]: 1054092, 1138804, 1541152, 1945668
153 [2]: 1215327, 1245154
155 [1]: 1207424
157 [1]: 1085121
159 [3]: 1004981, 1240229, 2081069
171 [2]: 1362662, 1575999
173 [2]: 1098914, 1504740
175 [4]: 1065181, 1162313, 1571521, 1711779
179 [2]: 1464720, 1636808
183 [4]: 1095896, 1219415, 1618775, 1707182
185 [1]: 1234730
189 [1]: 1547744
193 [1]: 1268399

[B]Total: 43 primes[/B]
(Found primes for 20 out of 30 Ks)

Taking 1000-1004.

Taking 1004-1006.

Taking 1006-1010.

Taking also 1010-1012.

Taking 1012-1016.

1004-1006 complete, one prime.

Taking 1016-1018.

1006-1010 complete, no primes.
Taking 1018-1020.

1010-1012 complete, no primes.

Taking 1020-1022.

Taking 1022to1024.

1016-1018 complete, no primes.

Taking 1024-1026.

1012-1016 complete, no primes.

Taking 1026-1028.

Taking 1028-1030.

Taking 1030-1032.

Taking 1032-1036.

1032-1036 complete, no primes.

Taking 1036-1044.

1020-1022 complete, no primes.

Taking 1044-1046.

1018-1020 complete, no primes.

Taking 1046-1048.

1022-1024 complete, no primes.

Taking 1048-1050.

1036-1044 complete, no primes.

Taking 1050-1058.

1030 to 1032 complete, no primes.

1024-1026 complete, no primes.

Taking 1058-1060.

1026-1028 complete, no primes.

1028-1030 complete, no primes.

1050-1058 complete , one prime.

Taking 1060-1068.

Taking 1068-1072.

Taking 1072-1074.

Taking 1074-1078

1060-1068 complete, one prime.

Taking 1078-1086

Taking also 1086-1090.
-Curtis

Taking 1090-1094.

I have tested all odd integers 1< k < 509203 for n <63
All are good So you can begin the reseach after
John
06:03:2011

Taking 1094to1096.

I just added new test files, starting at 1100k, using the latest Psieve file of May 13.

Taking 1096 to 1100 also.

Taking 1100-1108.

1078-1086 complete, one prime.

1044-1046 and 1058-1060 complete, no primes.

1046-1050 complete, no primes.

Taking 1108-1116.

1072-1074 complete, no primes.

Taking 1116-1118.

1100-1108 complete, one prime.

1108-1116 complete, no primes.

Taking 1118-1126.

1068-1072 complete, no primes.

1074-1078 complete, no primes

Taking 1126-1132

Taking 1132-1134.

1118-1126 complete, no primes.

Taking 1134-1142.

1090-1094 complete, no primes.

Taking 1142-1144.

1116-1118 complete, no primes.

Taking 1144-1152.

1134-1142 complete, 2 primes.

1094-1096 complete, 1 prime.

Starting from 1152k test files replaced using the latest Psive file of June 13.

Taking 1152-1160.

1142-1144 complete, no primes.
(1132-1134 still running)

Taking 1160-1162.

1144-1152 complete, no primes.

1086 to 1090 complete, no primes.

1152-1160 complete, no primes.

Taking 1162-1170.

1132-1134 complete, no primes.

1096-1100 complete. one prime.

Taking 1170-1172.

1162-1170 complete, one prime.

Taking 1172-1180.

1160-1162 complete, no primes.

1126-1132 complete. no primes.
Taking 1180-1186

1172-1180 complete, no primes.

Taking 1186-1194.

Taking 1194-1196

1194-1196 complete, no primes.
Taking 1196-1202

1186-1194 complete, no primes.

Taking 1202-1210.

1196-1202 complete, no primes.
Taking 1210-1220.

Taking 1220-1222.

Taking 1222-1230.

1170-1172 complete, no primes.

I also added new test files.

1202-1210 complete, one prime.

1210-1220 complete, 3 primes.

1222-1230 complete, one prime.

Taking 1230-1238.

Taking 1238-1240.

Taking 1240-1248.

unconnected sent me results of the 1000-1004 files, all tests complete, no primes found.

We are now at n=1180k.

---------

I'm taking 1248-1250 and I added more test files up to 1300k.

1230-1238 complete, one prime.

1240-1248 complete, 3 primes.

Taking 1250-1258.

1220-1222 complete, no primes.

Taking 1258-1260.

1250-1258 complete, no primes.

Taking 1260-1268.

Taking 1268-1276.

Taking 1276-1278.

1260-1268 complete, no primes.

1248-1250 complete, no primes.

Taking also 1278-1282.

Taking 1282-1290.

1180 to 1186 complete. no primes.

Taking 1290 to 1298.

1268-1276 complete (2 primes).

Taking 1298-1306.

1282-1290 complete (1 prime).

Taking 1306-1310 for my office machine.

Taking 1310-1318.

Taking 1318-1326.