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 2011-11-16, 22:11 #1 Lennart     "Lennart" Jun 2007 21408 Posts List of megabit primes found This is a list of primes found for the megabit twin subproject. So far, we've found 4 primes of the form k*2^1000000-1. The k values are: 20667679305 24335320035 26983775475 48487212045 No megabit twins or sophies have been found yet. -------------------------------------------------------------------- (Original message, split off from the variable-n primes thread) 26983775475*2^1000000-1 is Prime 24335320035*2^1000000-1 is Prime Lennart Last fiddled with by Oddball on 2011-12-25 at 19:06
 2011-11-17, 09:23 #2 odicin   Sep 2011 Potsdam, Germany 24×7 Posts Double check of primes and residues: Code: 20667679305*2^1000000-1 is prime! Time : 1671.008 sec. 20667679305*2^1000000+1 is not prime. Proth RES64: D5FEDE3C68FF8A33 Time : 1654.849 sec. 20667679305*2^999999-1 is not prime. LLR Res64: 5D7D54EA474DE2F3 Time : 1674.946 sec. 20667679305*2^1000001-1 is not prime. LLR Res64: 190ABF16BF2300A1 Time : 1676.490 sec. 24335320035*2^1000000-1 is prime! Time : 1666.407 sec. 24335320035*2^1000000+1 is not prime. Proth RES64: A1E8CE41DC18A34D Time : 1638.813 sec. 24335320035*2^999999-1 is not prime. LLR Res64: 4E3BF10A827D4295 Time : 1648.949 sec. 24335320035*2^1000001-1 is not prime. LLR Res64: B4D3DA96380D5567 Time : 1649.050 sec. 26983775475*2^1000000-1 is prime! Time : 1649.023 sec. 26983775475*2^1000000+1 is not prime. Proth RES64: 928A3068285A3CBC Time : 1635.337 sec. 26983775475*2^999999-1 is not prime. LLR Res64: 73907D3ECAE5227B Time : 1648.821 sec. 26983775475*2^1000001-1 is not prime. LLR Res64: B7A0936C2CBE99B0 Time : 1648.816 sec. 48487212045*2^1000000-1 is prime! Time : 1659.424 sec. 48487212045*2^1000000+1 is not prime. Proth RES64: 2F884A10EB19288F Time : 1637.815 sec. 48487212045*2^999999-1 is not prime. LLR Res64: 33F1764E8034A4BC Time : 1662.335 sec. 48487212045*2^1000001-1 is not prime. LLR Res64: F729303DBDEE3C92 Time : 1649.756 sec. ------------------------------------------------------------ Original message: Ok, I did a manual check of this at my founded prime: 20667679305*2^1000001-1 is not prime. LLR Res64: 190ABF16BF2300A1 Time : 2064.986 sec. 20667679305*2^999999-1 is not prime. LLR Res64: 5D7D54EA474DE2F3 Time : 2036.156 sec. Regards Odi Last fiddled with by Oddball on 2011-12-25 at 19:04
 2011-12-24, 17:41 #3 Neo     Dec 2010 Ava, Missouri 23×5 Posts 48487212045*2^1000000-1 is prime! Neo
 2012-02-14, 08:19 #4 odicin   Sep 2011 Potsdam, Germany 24·7 Posts 66708604185*2^1000000-1 is prime! Twin check: 66708604185*2^1000000+1 is not prime. LLR Res64: 94BB98BED224D61C Time: 3322 seconds Manuel SG check: 66708604185*2^1000001-1 is not prime. LLR Res64: 566F61223CA0F769 Time: 2109.128 sec. 66708604185*2^999999-1 is not prime. LLR Res64: 2405E98D475668A3 Time: 1969.096 sec.
 2012-05-05, 13:29 #5 odicin   Sep 2011 Potsdam, Germany 11210 Posts 77522904885*2^1000000-1 is prime! Twin check: 77522904885*2^1000000+1 is not prime. Program: llr64.exe Residue: 75A34B58D608272C Time: 543 seconds Manual SG check: 77522904885*2^1000001-1 is not prime. LLR Res64: 0EC8AB6734658482 Time : 2272.483 sec. 77522904885*2^999999-1 is not prime. LLR Res64: 86C921E9616CB41E Time : 2055.888 sec.
 2012-06-25, 05:58 #6 odicin   Sep 2011 Potsdam, Germany 24·7 Posts 91452556965*2^1000000-1 is prime! Twin check: 91452556965*2^1000000+1 is not prime. Program: llr64.exe Residue: 01506EA85432951B Time: 2227 seconds Manual SG check: 91452556965*2^1000001-1 is not prime. LLR Res64: 8291E8E7C5462B76 Time : 1945.158 sec. 91452556965*2^999999-1 is not prime. LLR Res64: 99A302C747692853 Time : 1877.592 sec.
 2012-07-06, 09:09 #7 amphoria     "Dave" Sep 2005 UK 1010110101102 Posts 202344306135*2^1000000-1 is prime! Twin check: 202344306135*2^1000000+1 is not prime. Proth RES64: 2E0ABD07D9C6D83D Time : 436.942 sec. SG check: 202344306135*2^1000001-1 is not prime. LLR Res64: C55DE4D2A568DB47 Time : 435.009 sec. 202344306135*2^999999-1 is not prime. LLR Res64: EA28384B138267B0 Time : 435.342 sec. Before anyone comments I know that I have assigned to the wrong project code - I was on auto-pilot!. I will contact Prof. Caldwell to get it corrected.
 2012-07-18, 19:01 #8 amphoria     "Dave" Sep 2005 UK 2·19·73 Posts 258937461585*2^1000000-1 is prime! Twin check: 258937461585*2^1000000+1 is not prime. LLR Res64: B8ADC99499633962 Time: 548 seconds SG check: 258937461585*2^1000001-1 is not prime. LLR Res64: 1EA6E1F69F52CD23 Time : 435.993 sec. 258937461585*2^999999-1 is not prime. LLR Res64: 480CD2B6B2C939B5 Time : 434.530 sec. Last fiddled with by amphoria on 2012-07-18 at 19:01
 2012-07-20, 18:39 #9 amphoria     "Dave" Sep 2005 UK 1010110101102 Posts 276244842795*2^1000000-1 is prime! Twin check: 276244842795*2^1000000+1 Residue: CD4DFAAB5F635E04 Time: 545 seconds SG check: 276244842795*2^1000001-1 is not prime. LLR Res64: CA11BC4DD9EE87AD Time : 433.668 sec. 276244842795*2^999999-1 is not prime. LLR Res64: 610C96738658B047 Time : 433.436 sec.
 2012-07-24, 05:51 #10 amphoria     "Dave" Sep 2005 UK 2·19·73 Posts 120617642145*2^1000000-1 is prime! Twin check: 120617642145*2^1000000+1 Residue: 22A1DE10142E81AA Time: 543 seconds SG check: 120617642145*2^1000001-1 is not prime. LLR Res64: EE0300FF99D35206 Time : 438.422 sec. 120617642145*2^999999-1 is not prime. LLR Res64: 6BCB61147505C9F7 Time : 439.422 sec.
 2012-07-26, 03:12 #11 Neo     Dec 2010 Ava, Missouri 23·5 Posts 135882407955*2^1000000-1 is prime! Twin check: 135882407955*2^1000000+1 is not prime. Proth RES64: 07EE213D630F53FD Time : 1949.612 sec. SG check: 135882407955*2^999999-1 is not prime. LLR Res64: ED33E855E104A66C Time : 1982.221 sec. 135882407955*2^1000001-1 is not prime. LLR Res64: ED3583F08FF8DDC1 Time : 1983.058 sec.

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