20110428, 09:42  #1 
Nov 2003
2×1,811 Posts 
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! Update (June 19, 2015): Extending the drive beyond n=2M and adding the following 11 Ks: 131, 133, 137, 139, 141, 143, 145, 161, 177, 181, and 187. Update (March 20th, 2020): Removing k=193 from the drive to be searched by an individual. Status Code:
Range of n Tested by Status 1,000,0001,700,000  RPS  Complete (38 primes) 1,700,0001,708,000  Carlos  Complete (183*2^17071821 is prime) 1,708,0001,720,000  Carlos  Complete (175*2^17117791 is prime) 1,720,0001,750,000  kracker  Complete 1,750,0001,762,000  Carlos  Complete 1,762,0001,780,000  kracker  Complete (123*2^17797281 is prime) 1,780,0001,830,000  Thomas  Complete 1,830,0001,838,000  lsoule  Complete 1,838,0001,900,000  kracker  Complete 1,900,0001,902,000  lsoule/Carlos  Complete 1,902,0001,950,000  kracker  Complete (149*2^19456681 is prime) 1,950,0001,952,000  Kosmaj  Complete 1,952,0001,980,000  kracker  Complete 1,980,0002,042,000  Carlos  Complete (143*2^20078881 is prime) 2,042,0002,054,000  amphoria  Complete 2,054,0002,056,000  Kosmaj  Complete 2,056,0002,068,000  amphoria  Complete 2,068,0002,070,000  Kosmaj  Complete 2,070,0002,094,000  amphoria  Complete (159*2^20810691 is prime) 2,094,0002,096,000  Kosmaj  Complete 2,096,0002,108,000  amphoria  Complete 2,108,0002,110,000  Kosmaj  Complete 2,110,0002,120,000  amphoria  Complete (117*2^21176001 is prime) 2,120,0002,170,000  amphoria  Complete (185*2^21279661 is prime) 2,170,0002,180,000  amphoria  Complete (187*2^21726931 is prime) 2,180,0002,200,000  amphoria  Complete 2,200,0002,202,000  unconnected  Complete 2,202,0002,300,000  Thomas11  Complete (137*2^22443981 and 185*2^22649061 are prime) 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. Last fiddled with by Thomas11 on 20220410 at 09:10 Reason: Corrected attachment 
20110428, 09:43  #2 
Nov 2003
2·1,811 Posts 
Found Primes
115 [2]: 1141719, 1524183
117 [6]: 1104138, 1210282, 1302764, 1554601, 1618434, 2117600 123 [3]: 1225115, 1241690, 1779728 129 [1]: 1376223 135 [1]: 1288177 137 [1]: 2244398 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 [3]: 1234730, 2127966, 2264906 187 [1]: 2172693 189 [1]: 1547744 193 [1]: 1268399 Total: 49 primes (Found primes for 22 out of 30 Ks) Last fiddled with by Thomas11 on 20220410 at 09:09 
20110428, 11:10  #3 
May 2009
Moscow, Russia
3^{2}·5^{2}·13 Posts 
Taking 10001004.

20110428, 11:46  #4 
Nov 2003
2·1,811 Posts 
Taking 10041006.

20110429, 09:14  #5 
Feb 2003
780_{16} Posts 
Taking 10061010.

20110502, 02:13  #6 
Nov 2003
7046_{8} Posts 
Taking also 10101012.

20110505, 14:33  #7 
Feb 2003
2^{7}×3×5 Posts 
Taking 10121016.

20110507, 13:08  #8 
Nov 2003
7046_{8} Posts 
10041006 complete, one prime.
Taking 10161018. 
20110512, 13:32  #9 
Feb 2003
780_{16} Posts 
10061010 complete, no primes.
Taking 10181020. 
20110513, 01:20  #10 
Nov 2003
E26_{16} Posts 
10101012 complete, no primes.
Taking 10201022. 
20110513, 13:16  #11 
Feb 2003
780_{16} Posts 
Taking 1022to1024.

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