20150417, 16:23  #78 
Feb 2013
2×229 Posts 
Tested out the mentioned C207 manually by just dividing the numbers, but for now Yafu says 7.76 hours more to go on the remaining C144.
I will perhaps get some answers to these numbers later on. Last fiddled with by storflyt32 on 20150417 at 16:24 
20150417, 16:42  #79 
Jun 2003
5151_{10} Posts 

20150417, 20:08  #80 
Feb 2013
2×229 Posts 
Thank you for doing that.
To people like me who are not supposed to be hacking and cracking numbers or at least codes, they become only a small part of a big puzzle. Came across a YouTube video while looking for other contents. https://www.youtube.com/watch?v=KmIDluvVZ2M Worth watching. 
20150422, 14:17  #81 
Feb 2013
2×229 Posts 
Came across this C103 a couple of days ago.
5257580682287346125119700202910679229423527432847302135626002052012162827616986817714988158206959997053 If you wish, you may give it a try. Possibly not the easiest number to factorize. Last fiddled with by storflyt32 on 20150422 at 14:52 
20150422, 16:06  #82 
Jun 2003
3·17·101 Posts 
What is special about this number? An arbitrary C103 number can be factored using GGNFS in under 1 hour on a modern 4core CPU.

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