View Single Post
Old 2021-08-10, 13:36   #1325
Happy5214
 
Happy5214's Avatar
 
"Alexander"
Nov 2008
The Alamo City

52×31 Posts
Default

I think the trick is to treat the 2 mod 3 in conjecture 2 not as an actual 2, but as -1 mod 3. That means you'd use 6 mod 7 for conjecture 10, giving you the prime 3121 as the one preserving the 13.
Happy5214 is offline   Reply With Quote