When you use the normal test sequence of Memtest86 it will run through eight seperate tests.
You will see the individual test being used in the upper right corner of the screen.
Test 0 - Address test, walking ones, no cache
Test 1 - Address test, own address
Test 2 - Moving inversions, ones and zero's
Test 3 - Moving inversions, 8 bit wide pattern
Test 4 - Moving inversions, random pattern
Test 5 - Block move, 64 moves
Test 6 - Moving inversions, 32 bit
Test 7 - Random number sequence
Test 8 - Modulo 20, ones and zero's.
Once all eight test have been completed you will see (about mid screen) "Pass" (third from the end before "Errors" and "ECC Err(or)s") under that will be the number of successful passes you have run. There will also be a notification below that to the same effect.
Screenshot here:
http://www.memtest.org/pics/i875-big.gif
There is also a ninth test. From the release notes:
The bit fade test initializes all of memory with a pattern and then sleeps for 90 minutes. Then memory is examined to see if any memory bits have changed. All ones and all zero patterns are used. This test takes 3 hours to complete. The Bit Fade test is not included in the normal test sequence and must be run manually via the runtime configuration menu.
Hope this helps you out.