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Message boards : 321 Prime Search : Welcome to the 321 Prime Search

Author	Message
Reggie Volunteer moderator Project administrator Volunteer tester Project scientist Send message Joined: 10 May 14 Posts: 192 ID: 311759 Credit: 131,245,199 RAC: 228,543	Message 116540 - Posted: 28 Mar 2018 | 18:59:51 UTC Last modified: 1 Nov 2020 | 1:29:27 UTC
	Welcome to the 321 Prime Search A 321 (or Thabit) number is in the form of 3*2^n-1. A 321 number of the second kind is in the form 3*2^n+1. PrimeGrid is searching for primes in both forms. These numbers have been studied by mathematicians since Thābit ibn Qurra in the 9th century. Originally, 321 primes were being searched for by the 321 Search Project. PrimeGrid completely took over the search in 2008. Further reading: List of Ns for which 3*2^n-1 is prime List of Ns for which 3*2^n+1 is prime Thabit Number on Wikipedia Primes found at PrimeGrid: 3*2^16408818+1 3*2^11895718-1 3*2^11731850-1 3*2^11484018-1 3*2^10829346+1 3*2^7033641+1 3*2^6090515-1 3*2^5082306+1 3*2^4235414-1 3*2^2291610+1
	ID: 116540 |

Message boards : 321 Prime Search : Welcome to the 321 Prime Search