20200831, 11:27  #1 
Mar 2018
17×31 Posts 
probable dud
((2^18752301)*10^564501+2^18752291) has small factors?
I don't know... 
20200831, 13:47  #2 
Mar 2019
2×5×17 Posts 
Well, have you PRP tested this with PFGW? Or are you asking us to do it for you?
Last fiddled with by enzocreti on 20200831 at 13:51 
20200831, 13:50  #3 
Undefined
"The unspeakable one"
Jun 2006
My evil lair
2·3^{2}·7^{3} Posts 

20200831, 13:52  #4 
Mar 2018
17×31 Posts 

20200831, 15:08  #5 
Aug 2006
3·1,993 Posts 
So what makes you think it is a probable prime?

20200831, 15:34  #6  
Random Account
Aug 2009
1,949 Posts 
This appears to be a request for somebody with a lot of cores to run it. I am not sure PFGW could handle it in this form. Then again, maybe it could. Any person trying may need several generations of descendants to see it done. It might have to look something like this though:
Quote:


20200831, 15:43  #7 
Mar 2018
527_{10} Posts 
Pg(69660) is prime
69660 is multiple of 215 and congruent to 215 mod 323...it is also 6 mod 13... using wolphram numbers of this form are 69660+xn where x i don't remember what it is. 69660 is the least number N such that N is 215 mod 323, N is 0 mod 215 and N is 6 mod 13... then you have other values using Chinese remainder theorem 
20200831, 15:43  #8 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
3×3,217 Posts 

20200831, 15:52  #9 
Mar 2019
2×5×17 Posts 

20200831, 17:36  #10  
Aug 2006
175B_{16} Posts 
Quote:
((2^18752301)*10^564501+2^18752291) is likely to be prime? 

20200831, 17:59  #11 
Mar 2019
2·5·17 Posts 
Putting this to rest:
Code:
$ ./pfgw64 i V N T8 q"((2^18752301)*10^564501+2^18752291)" PFGW Version 4.0.0.64BIT.20190528.x86_Dev [GWNUM 29.8] Generic modular reduction using generic reduction AVX512 FFT length 384K, Pass1=1K, Pass2=384, clm=1, 8 threads on A 3750464bit number Resuming at bit 1480000 ((2^18752301)*1....501+2^18752291) is composite: RES64: [52E573162A497910] (5201.6106s+0.0149s) 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Probability to find a probable prime  enzocreti  enzocreti  2  20190923 06:13 
Is 2^1028379412^102837931 probable prime?  enzocreti  enzocreti  9  20190916 07:04 
The probable primes  philmoore  Five or Bust  The Dual Sierpinski Problem  388  20190301 04:30 
Probable prime with more than 400k digits  enzocreti  enzocreti  2  20190210 16:17 
probable largest prime.  sudaprime  Miscellaneous Math  11  20180205 08:10 