mersenneforum.org Primes of the form 2401*2^n+1
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 2023-05-13, 02:39 #1 YaoPlaysMC   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.
 2023-05-13, 03:17 #2 YaoPlaysMC   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 2023-05-13 at 03:23
 2023-05-13, 16:26 #3 Cybertronic     Jan 2007 Germany 12458 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 top-10000 starts with numbers >308000 digits. Last fiddled with by Cybertronic on 2023-05-13 at 16:28

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