Top project sorted by number of primes

At this site we keep several lists of primes, most notably the list of the 5,000 largest known primes. Who found the most of these record primes? We keep separate counts for persons, projects and programs. To see these lists click on 'number' to the right.

Clearly one 100,000,000 digit prime is much harder to discover than quite a few 100,000 digit primes. Based on the usual estimates we score the top persons, provers and projects by adding ‎(log n)³ log log n‎ for each of their primes n. Click on 'score' to see these lists.

Finally, to make sense of the score values, we normalize them by dividing by the current score of the 5000th prime. See these by clicking on 'normalized score' in the table on the right.

rank project primes score 1 PrimeGrid 4092.5 56.5007 2 Conjectures 'R Us 223.5 53.1886 3 Riesel Prime Search 92.5 52.1927 4 Primeform e-group 65 31.2950 5 Twin Prime Search 60 50.3947 6 No Prime Left Behind (formerly: PrimeSearch) 47 50.9599 7 Prime Internet Eisenstein Search 30 55.0414 8 Great Internet Mersenne Prime Search by Woltman & Kurowski 18 58.5540 9 Private GFN server 16.5 49.3091 10 The Other Prime Search 14 47.5237 11 primecrunch.com 10 49.3991 12 Seventeen or Bust 6.5 53.0183 13 Sierpinski/Riesel Base 5 5 49.1267 14 Riesel Sieve Project 2.5 47.6367 14 Science United 2.5 50.2219 16 The Prime Sierpinski Problem 2 51.4713 17 12121 Search 1.5 49.3399 17 321search 1.5 47.2705 17 Rechenkraft.net e.V. 1.5 47.5265 20 SRBase 1 46.9962

Notes:

Number of primes

When counting primes we decided that if three people (persons) went together to find a prime, each should get credit for 1/3 of a prime. The same is true for projects, however programs get full credit for each prime (to encourage honest reporting of what programs where used). Persons, programs and projects are three separate categories and do not compete against each other.

For example, suppose the persons 'Carmody' and 'Caldwell' worked together and used the program 'PRP' to test candidates selected by the 'GFN 2^13 Sieving project', then completed their proofs using 'Proth.exe'. Then the persons 'Carmody' and 'Caldwell' would get 1/2 credit for each prime found; but the project 'GFN 2^13 Sieving project' and the programs 'PRP' and 'Proth.exe' would each get full credit.<\p>