I have had close to a dozen different species of Scolependra, which is the species of all gian centipedes. I have found the Vietnamese species and the Hatian species easiest to keep, and can grow to a foot and eat a mouse with a scrap left (they will eat live or thawed. Most people believe they are pure predators, but they also scavange). However it is best to feed llarge crickets or Hatian roaches, as that is more a part of their native diet. Stay away from the S. Arizonis (from Arizona), it is a desert species that is rather hard to keep. The is another great species from China that has a black body red head & yellow legs & can live communally. The largest species available is the Peruvian, which I have seen & it is beautiful but very expensive (usually over $100).
One warning. These things are quick, strong, and great ecape artists. While their venom is not medically significant, a bit can cause tremendous pain for hours or even days (only the Vietnamese has an attributable death & that was a baby). I gave all of mine away when I had twins 5 months ago because I they escaped on a weekly basis (but were easy to find because they always went to the same place).
True story. I had a Vietnamese that ripped tnhe top part of its head off on the covering then ran madly around the cage for 3 days before expiring.
A good web site to check out keeping infor is
www.petbugs.com. A good site for purchase is
www.swiftinvertibrates.com, although I usually purchase at reptile shows for a fraction of what web sites and stores sell the for, because you can purchase straight from the breeder. Let me know if I can provide additional info.
BTW, Life expectancy is usually 6 years, but the Chinese species I mentioned can live over 10 years. I kept a few for 32 years before having to give them away. I enjoyed them so much I got a tat of a Vietnamese.