572 to 573 complete no primes

taking 578-579
taking 579-580

573-574 complete, no primes.

Taking 580-581.

574-575 complete, no primes.

B'maxx completed 566-567, no primes.

Taking now 581-582.

576-577 complete, no primes.

Taking 582-583.

Taking 583-584
How much of these ranges must I test to find a prime?

nuggetprime

569-570 complete, no primes.

Taking 584-585.

[B]Nuggetprime[/B]
Nobody knows, maybe 1, maybe 10 or more.
If you consider that in the 500-580k range there were 8 primes found, then on average you will have to process 10 files to find one prime.

578-579 complete no primes

580-581 complete, no primes.

Taking 585-586.

579-580 complete, no primes

taking 586-587

Taking 587-588.