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Old 2016-11-30, 06:32   #1
carpetpool
 
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"Sam"
Nov 2016

5148 Posts
Post Want to crash PFGW?

I've noticed an issue with PFGW's ABC and ABC2 files which will cause pfgw 3.8.1 to crash. For some reason, the expression (b^n-1)/(b-1) (with a fixed value of n) will cause pfgw to stop working if evaluated in a ABC or ABC2 sieve file. Thanks to anyone who has pfgw 3.8.1 and is willing to try this.

input.txt:

---------
ABC2 ($a^73-1)/($a-1)
a: from 1 to 10
---------

or an ABC file:

---------
ABC ($a^73-1)/($a-1)
1
2
3
4
5
6
7
8
9
10
---------

Note: (You may replace the 73 with any exponent, just using it as an example.)

and run with

pfgw64.exe input.txt

and pfgw 3.8.1 will stop working.
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Old 2016-11-30, 06:34   #2
Batalov
 
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"Serge"
Mar 2008
Phi(4,2^7658614+1)/2

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Dividing by zero is hard!
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Old 2016-11-30, 06:36   #3
carpetpool
 
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"Sam"
Nov 2016

22·83 Posts
Post

Quote:
Originally Posted by Batalov View Post
Dividing by zero is hard!
Good point. I didn't see that there.
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