20110428, 09:42  #1 
Nov 2003
3622_{10} 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
3·5·197 Posts 
Taking 10001004.

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

20110429, 09:14  #5 
Feb 2003
2^{7}×3×5 Posts 
Taking 10061010.

20110502, 02:13  #6 
Nov 2003
2·1,811 Posts 
Taking also 10101012.

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

20110507, 13:08  #8 
Nov 2003
2·1,811 Posts 
10041006 complete, one prime.
Taking 10161018. 
20110512, 13:32  #9 
Feb 2003
3600_{8} Posts 
10061010 complete, no primes.
Taking 10181020. 
20110513, 01:20  #10 
Nov 2003
2×1,811 Posts 
10101012 complete, no primes.
Taking 10201022. 
20110513, 13:16  #11 
Feb 2003
2^{7}·3·5 Posts 
Taking 1022to1024.

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