20230513, 02:39  #1 
Nov 2020
3·5 Posts 
Primes of the form 2401*2^n+1
I'm planning on searching k=2401 up to 3 million. I have a feeling that this base is slightly lucky due to 2401 = 7*7*7*7.

20230513, 03:17  #2 
Nov 2020
3×5 Posts 
I realized that PrimeGrid is already doing all the k's from 1 to 10000 so k=2401 is already taken. Maybe I'll do k = 1234321 instead?
Last fiddled with by YaoPlaysMC on 20230513 at 03:23 
20230513, 16:26  #3 
Jan 2007
Germany
1245_{8} Posts 
For open k's,you can take a look here
https://pzktupel.de/Primetables/TableProthTOP10KK.php Line 3446 is listed a k=2401. This top10000 starts with numbers >308000 digits. Last fiddled with by Cybertronic on 20230513 at 16:28 
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