2006-01-16, 12:36 #31 Greenbank     Jul 2005 2·193 Posts Yup, just noticed that:- $../dodeca20 50 717000000000000 720000000000000 You can also find the k n values in results_dodeca.txt file ( These are 3-probable primes ) n=50, kmin=717000000000000, kmax=720000000000000, version=2.0 Starting the sieve... Using the first 8 primes to reduce the size of the sieve array 717083008036395 50 The sieving is complete. Number of Prp tests=213 Time=6 sec. This proves that double checking is useful (and necessary!). Also got:-$ ../dodeca20 58 10000000000000000 100000000000000000 You can also find the k n values in results_dodeca.txt file ( These are 3-probable primes ) n=58, kmin=10000000000000000, kmax=100000000000000000, version=2.0 Starting the sieve... Using the first 11 primes to reduce the size of the sieve array 74362823389729875 58 Status: 6.0 percentage of the project is complete. Time thusfar: 990 sec. Yes, that's in the range 10000T (1E16) to 100000T (1E17). Sorry Kosmaj, this was in your reserved range, I was supposed to be testing n=55. Should teach me to check things more closely. Last fiddled with by Greenbank on 2006-01-16 at 12:39