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 Kosmaj 2010-10-24 14:32

The First Megabit Drive

The First Megabit Drive

I am pleased to announce our first multi-k drive featuring only megabit exponents.
Initially we have the following 6 Ks sieved up to p=54T.

k = 51, 57, 61, 65, 69, 87

We have more Ks being sieved right now. They will be added later, either as a part of this drive, or in a new drive.

Happy hunting!

Note (Jan. 26 2011): k = 47, 53 added as Batch-2

Note-2 (Aug. 12, 2014): k=51 and 69 removed from the drive,
The following Ks added:
k=35, n > 2520k
k=37, n > 2500k, only n !=1 mod 10
k=103, n >= 2550223
k=111, n >= 2601487

As the results, the following 10 Ks are now being tested: 35, 37, 47, 53, 57, 61, 65, 87, 103, and 111.

[B]Found Primes[/B]
[code]
47 [1]: 1025950
51 [3]: 1026910, 1027635, 1231665
53 [1]: 1632590
57 [6]: 1098272, 1110980, 1486214, 2103370, 2639528, 3093440, ... 3339932
61 [8]: 1124049, 1416365, 1487125, 1734983, 2134577, 2381887, 2580689, 2936967
65 [7]: 1374574, 1421088, 1505640, 2450614, 2583720, 2876718, 3080952
69 [6]: 1473217, 1566375, 2174213, 2410035, 2428251, 2649939
87 [7]: 1089098, 1120006, 1332741, 1358189, 1616138, 1852590, 2518122
111 [1]: 3060238

[B]Total: 41 primes[/B]

[B]Primes found by others:[/B]
June 22, 2016: 61*2^3286535-1 Ruediger K. Eckhard
January 30, 2017: 61*2^3366033-1 Ruediger K. Eckhard

[/code][B]Status[/B]
[CODE]
Range of n Tested by Status
[URL="http://kosmaj.sakura.ne.jp/rps/megabit1/megabit1_done.txt"]1,000,000-2,380,000[/URL] - RPS - Complete (26 primes)
2,380,000-2,384,000 - AES - Complete (61*2^2381887-1 is prime)
2,384,000-2,386,000 - Kosmaj - Complete
2,386,000-2,388,000 - AES - Complete
2,388,000-2,420,000 - Kosmaj - Complete (69*2^2410035-1 is prime)
2,420,000-2,424,000 - Carlos - Complete
2,424,000-2,444,000 - Carlos - Complete (69*2^2428251-1 is prime)
2,444,000-2,456,000 - Kosmaj - Complete (65*2^2450614-1 is prime)
2,456,000-2,468,000 - Carlos - Complete
2,468,000-2,480,000 - pepi37 - Complete
2,480,000-2,484,000 - Carlos - Complete
2,484,000-2,494,000 - Kosmaj - Complete
2,494,000-2,500,000 - kracker - Complete
2,500,000-2,506,000 - Thomas - Complete
2,506,000-2,508,000 - Kosmaj - Complete
2,508,000-2,550,000 - Thomas - Complete (87*2^2518122-1 is prime)
2,550,000-2,582,000 - Thomas - Complete (61*2^2580689-1 is prime)
2,582,000-2,600,000 - Thomas - Complete (65*2^2583720-1 is prime)
2,600,000-2,700,000 - Thomas - Complete (57*2^2639528-1 is prime)
2,700,000-2,800,000 - Thomas - Complete
2,800,000-2,900,000 - Thomas - Complete (65*2^2876718-1 is prime)
2,900,000-3,000,000 - Thomas - Complete (61*2^2936967-1 is prime)
3,000,000-3,100,000 - Thomas - Complete (111*2^3060238-1, 65*2^3080952-1, and 57*2^3093440-1 are primes)
[/CODE][B]Available Files[/B]
Extensively sieved by Psieve (the latest sieve file of July 31, 2011)

(*) In parentheses: Percentage of tests requiring the indicated FFT lengths on AVX CPUs.

 Kosmaj 2010-10-24 14:32

Taking 1000-1003

 lsoule 2010-10-24 16:56

Taking 1003-1006

 unconnected 2010-10-24 17:08

Taking 1006-1012.

 pb386 2010-10-24 21:41

taking 1012-1018

 lsoule 2010-10-25 04:26

1003-1006 just about done so I'm going to take 1018-1024

 lsoule 2010-10-26 16:38

1003-1006 and 1018-1024 complete, no primes.
Taking 1024-1030.

 em99010pepe 2010-10-27 16:56

Taking 1030-1042.

 lsoule 2010-10-27 16:59

1024-1030 complete, 2 primes (both with k=51!)

Taking 1042-1048

 Kosmaj 2010-10-28 16:21

Taking 1048-1051.

 lsoule 2010-10-28 19:03

1042-1048 complete, no primes.
Taking 1051-1057

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