http://www.celebrities-galore.com
http://seventhlifepath.com/life-path-number-compatibility/ This is the numerology calculator I use.. and these descriptions of compatibility can be slightly modified to fit not only the life path compatibility, but the other numbers of the chart.
Life path number compatibility is important, but it is also important to look at all of the other numbers that influence someone's life.
Having compatible life path numbers are the most influential long term, but can be undermined if other aspects are incompatible.
I am life path 33 and my most intense soul mate that's around right now is an 11.
11's have a lot of psychic access.. they are 2's (the most receptive, yin number) represented by two 1's (the most active, yang number). So they are kind of like lightning rods. I find that usually, they don't have consistent access to this power, though.. it kind of just hits them sometimes. Any master number can also revert to it's lower expression, when not operating at full potential.
With me and my SM: though our life path numbers are compatible, there are major differences in their expression. These differences, while obvious, seem to be glossed over with our other number compatibility. For example: We both have Destiny Number 6, which makes us both nurturers. I have Soul Urge 5, he has Soul Urge 7 which are both expansive numbers. My Personality Number is 7, His is 4, which means he is the rock while I've got my head in the clouds.
You can also see how these different aspects of the relationship synergize with each other. Another Personality 4 might find my 7 Personality a bit too woo woo, but since he has a Soul Urge of 7, my personality is attractive to the growth of his soul! I think our 6 Destiny really pulls us together in that love kind of way, though. Even though we are both kind of adventurous and flighty, we can totally see that nurturer in the other person and I think it's something we both know we need.