Post small primes and tell us about your progress here - Page 9

ValerieVonck · 2007-01-22, 13:36

686701125*2^59037 - 1 is prime! 17781 digits
686701125*2^61564 - 1 is prime! 18542 digits
686701125*2^61743 - 1 is prime! 18596 digits
686701125*2^71904 - 1 is prime! 21655 digits

ValerieVonck · 2007-01-24, 14:28

Code:

  686701125*2^77984 - 1 is prime!  23485 digits
  686701125*2^82487 - 1 is prime!  24840 digits

ValerieVonck · 2007-01-31, 21:21

Code:

  686701125*2^85355  -1 is prime!  25704 digits
  686701125*2^86208  -1 is prime!  25961 digits
  686701125*2^92474  -1 is prime!  27847 digits
  686701125*2^101321 -1 is prime!  30510 digits

kar_bon · 2007-02-21, 06:07

475977645 199782 is prime (60150 digits)

Thomas11 · 2007-03-02, 11:03

For k=37850187375 (Nash weight: 7261) the 100th prime appeared at n=13719

Here is the list of n which yield primes up to n=24000:

Code:

2, 5, 13, 16, 19, 20, 41, 56, 57, 64, 66, 74, 90, 97, 100, 107, 130,
137, 145, 147, 149, 171, 172, 178, 208, 241, 258, 301, 302, 318, 330,
331, 386, 439, 460, 462, 526, 529, 556, 558, 563, 625, 626, 628, 666,
699, 797, 804, 890, 907, 928, 968, 1050, 1117, 1247, 1304, 1453, 1584,
1782, 1788, 2115, 2193, 2239, 2371, 2439, 2533, 2789, 2827, 2984, 3044,
3382, 3568, 3633, 3884, 3900, 3909, 4406, 4426, 5833, 6241, 6283, 6325,
6580, 6596, 6714, 7621, 7727, 7968, 8323, 8817, 9002, 9258, 9833, 11742,
11868, 12248, 12294, 12754, 13340, 13719, 15527, 15913, 16323, 16554,
19362, 19802, 20013, 22376

kar_bon · 2007-03-07, 07:30

475977645*2^207784-1 (62558 digits)

nuggetprime · 2007-03-13, 17:03

k=19217385 tested from 50k to 70k.
There are primes for the following n:
60121
62263
64849
66746 <----- 100th prime

kuratkull · 2007-03-19, 06:19

I decided to sieve and LLR some smaller N's for my K, which is already being sieved and LLR'd from 300k-500k.

228461805*2^102923-1 is prime! (30992 digits)

Templus · 2007-03-19, 19:08

I am currently working on 2 k's :

11069*2^n-1 : (on other machine) done until 450k
21879*2^n-1 : 28, 232, 244, 292, 448, 2068, 17548, 64288 ; done until 300k

kar_bon · 2007-03-21, 06:50

475977645*2^218689-1 is prime (65841 digits)
tested now from n=0-220k and n=250k-354k
99 primes found at all

kar_bon · 2007-04-10, 07:49

475977645*2^232257-1 is prime
tested now from n=0-236k and n=250k-371k
100 primes found at all

2007-01-22, 13:36	#89
ValerieVonck Mar 2004 Belgium 29² Posts	k=686701125 6867011252^59037 - 1 is prime! 17781 digits 6867011252^61564 - 1 is prime! 18542 digits 6867011252^61743 - 1 is prime! 18596 digits 6867011252^71904 - 1 is prime! 21655 digits

2007-01-24, 14:28	#90
ValerieVonck Mar 2004 Belgium 29² Posts	Code: 6867011252^77984 - 1 is prime! 23485 digits 6867011252^82487 - 1 is prime! 24840 digits

2007-01-31, 21:21	#91
ValerieVonck Mar 2004 Belgium 29² Posts	k=686701125 Code: 6867011252^85355 -1 is prime! 25704 digits 6867011252^86208 -1 is prime! 25961 digits 6867011252^92474 -1 is prime! 27847 digits 6867011252^101321 -1 is prime! 30510 digits

2007-03-19, 06:19	#96
kuratkull Mar 2007 Estonia 3·47 Posts	k=228461805 I decided to sieve and LLR some smaller N's for my K, which is already being sieved and LLR'd from 300k-500k. 228461805*2^102923-1 is prime! (30992 digits)

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2007-02-21, 06:07	#92
kar_bon Mar 2006 Germany 43·67 Posts	475977645 199782 is prime (60150 digits)

2007-03-07, 07:30	#94
kar_bon Mar 2006 Germany 43·67 Posts	475977645*2^207784-1 (62558 digits)

2007-03-13, 17:03	#95
nuggetprime Mar 2007 Austria 2×151 Posts	k=19217385 tested from 50k to 70k. There are primes for the following n: 60121 62263 64849 66746 <----- 100th prime

2007-03-19, 19:08	#97
Templus Jun 2004 2×53 Posts	I am currently working on 2 k's : 110692^n-1 : (on other machine) done until 450k 218792^n-1 : 28, 232, 244, 292, 448, 2068, 17548, 64288 ; done until 300k

2007-03-21, 06:50	#98
kar_bon Mar 2006 Germany 43·67 Posts	475977645*2^218689-1 is prime (65841 digits) tested now from n=0-220k and n=250k-354k 99 primes found at all

2007-04-10, 07:49	#99
kar_bon Mar 2006 Germany 43×67 Posts	475977645*2^232257-1 is prime tested now from n=0-236k and n=250k-371k 100 primes found at all