Quote:
Originally Posted by Washuu
IMO you can post your primes to "top5000" list only if your primes are at least 56000 digits long, unless they have some "special form". "Special form" is NOT k*b^n+c, but I may be wrong...

Yes, but I didn't mean top5000, I meant the prime database in general. From
http://primes.utm.edu/primes/search.php:
Quote:
You may also restrict the primes selected by specifying a minimum and/or maximum number of digits. Since all primes in this database have at least 1000 digits, smaller minimums would be meaningless.

So, the primes found by me can be added to the database.
There also exists
http://15k.org/stats.htm  main 15k status page, where all primes found are listed.
PS: Thanks for the formula!