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2020-09-02, 13:18   #188
Dylan14

"Dylan"
Mar 2017

232 Posts

Quote:
 Originally Posted by Dylan14 Reserving n = 74, k = 80e14 - 100e14.
Range is complete:
Code:
no factor for k*2^74+1 in k range: 8000000000000000 to 9007199254740991 (127-bit factors) [mmff 0.28 mfaktc_barrett128_F64_95gs]
no factor for k*2^74+1 in k range: 9007199254740992 to 10000000000000000 (128-bit factors) [mmff 0.28 mfaktc_barrett128_F64_95gs]

2020-10-02, 13:47   #189
matzetoni

Feb 2019

7·11 Posts

Quote:
 Originally Posted by matzetoni I'd like to take n=18e3-19e3, k=2e6-5e6
I have processed half of the range. PRPs for n=18000-18499, k=2e6-5e6 are attached. Found one xGF so far:

Code:
3796269*2^18431+1 is a Factor of xGF(18430,12,7)!!!!
Attached Files
 gfnd_n18000-18499_k2M-5M.zip (491.9 KB, 41 views)

2020-10-03, 10:24   #190
ET_
Banned

"Luigi"
Aug 2002
Team Italia

22·1,193 Posts

Quote:
 Originally Posted by matzetoni I have processed half of the range. PRPs for n=18000-18499, k=2e6-5e6 are attached. Found one xGF so far: Code: 3796269*2^18431+1 is a Factor of xGF(18430,12,7)!!!!
Thank you!
Once you finish the range, please attach the full list of factors found, and I will send it to Prof Keller.

Last fiddled with by ET_ on 2020-10-03 at 10:24

 2020-11-15, 14:39 #191 Dylan14     "Dylan" Mar 2017 10000100012 Posts Taking the following gaps, to test with gfndsieve + pfgw with the -gx flag: n: 80001-80999, k: 25e4-30e4 n: 90001-90999, k: 20e4-25e4
2020-11-17, 19:07   #192
matzetoni

Feb 2019

4D16 Posts

Hi,
I finished the range n=18k-19k, k=2M-5M and found 2 xGF divisors:
3796269*2^18431+1 is a Factor of xGF(18430,12,7)!!!!
2130243*2^18749+1 is a Factor of xGF(18746,7,5)!!!!

A list of all prps I've found is in the attached zip file.
Attached Files
 gfnd_n18000-19000_k2M-5M.zip (976.5 KB, 20 views)

 2020-11-19, 15:43 #193 MattcAnderson     "Matthew Anderson" Dec 2010 Oregon, USA 26F16 Posts Reserving FermatFactor=36,700e15,900e15 This should take me several months. Matt
2020-11-19, 17:12   #194
ET_
Banned

"Luigi"
Aug 2002
Team Italia

10010101001002 Posts

Quote:
 Originally Posted by MattcAnderson Reserving FermatFactor=36,700e15,900e15 This should take me several months. Matt
Good luck!

Should we reserve just one big chunk for 815e15<k<900e15?

Luigi

Last fiddled with by ET_ on 2020-11-19 at 17:12

 2020-11-20, 03:04 #195 MattcAnderson     "Matthew Anderson" Dec 2010 Oregon, USA 7·89 Posts Luigi, I say you just reserve one big chunk. That makes bookkeeping easier. I plan on reporting results every few weeks. Should we reserve just one big chunk for 815e15

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