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Old 2005-12-22, 17:52   #166
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2655-2660 complete, no primes
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Old 2005-12-23, 01:07   #167
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2675-2680 complete, one prime (870667875 267981)
Taking 2695-2700.
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Old 2005-12-23, 14:33   #168
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New files in the 270-280k range sieved to 2150bn are now available.

BTW, here is the number of candidates per k in the 270-280k range sorted in their decresing order together with the number of primes found so far.
Code:
     k       #cand  #primes
 870667875    1461     4
1952775825    1455     3
 804003525    1415     3
 460735275    1408     3
3467560635    1403     0
 918332415    1367     4
 697942245    1310     2
2022381375    1303     5
1738812075    1291     1
1626176475    1285     2
 779602395    1283     0
1694614845    1278     3
 663301485    1271     1
3276742755    1250     3
1325978745    1241     3
  67342275    1211     1
Overall in the 200-400 range the order is slightly different but the first and the last k are the same.

Observations:
1) k=3467560635 has a lot of candidates surviving sieving yet it is together with k=779602395 without primes.
2) k=2022381375 is in the middle by number of candidates but it produced the largest number of primes (5).
3) k=870667875 on the top produced many primes as expected (4).
4) k=3276742755 and k=1325978745 are near the bottom but with 3 primes each they are the most prolific.

Last fiddled with by Kosmaj on 2005-12-23 at 14:36
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Old 2005-12-25, 02:38   #169
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2685 to 2690 complete, no primes :(

Dr. Mike..
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Old 2005-12-25, 03:31   #170
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Yeah, no primes in your range, a major problem :surprised

But how about those 3 you reported yesterday?
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Old 2005-12-26, 07:03   #171
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2660-2665 complete, one prime already reported
804003525 266132

Taking 3 files: 2700-2715.
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Old 2005-12-26, 18:54   #172
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Taking 3 files: 2715-2730

Last fiddled with by lsoule on 2005-12-26 at 19:06
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Old 2005-12-27, 02:04   #173
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2665-2670 complete, no primes.

An early prime at the 270k level:
1738812075 270036, 81299 digits

The 2nd prime for this k.
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Old 2005-12-28, 01:43   #174
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779602395*2^270175-1 is prime! 81340 digits

The first prime for this k :surprised and the 40th prime in this drive!

Last fiddled with by Kosmaj on 2005-12-28 at 01:51
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Old 2005-12-29, 21:37   #175
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2720-2730 complete (2 files), 4 primes

1738812075 272308
870667875 272449
870667875 272494
918332415 272910
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Old 2005-12-29, 21:38   #176
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Taking 3 files: 2730-2745
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