Is a long duration domain name useful to website's SEO?

I heard that google will think long duration of domain name a good factor of SEO. But I am not certain about it. I found even Google.com,Yahoo.com has not a very long time duration. Anyone can help me?

if your asking about the domain age, yes, its one of the factors of Google to consider the site's quality and importance...

Ah yes, the old "register for 10 years and watch your SERPs improve" rumour. Guess who pushes this idea most: GoDaddy (I'm sure they've nothing to gain from this at all )

I've seen absolutely no evidence that it makes the slightest bit of difference, and why should it (a reward for those with the most spare cash in the bank maybe?!)

Thank you for your reply.I did not mean registration period of domain name, but mean hong long will it expired . Thank you

i think both of them are important:
1- age of domain
2-time remained to expire the domain.
when google know that yo register a domain for 5 years, judge that you want work on it and you are more reliable.

Their replies are opposite, who should I follow?

I Think You Should Follow Me!

first see here:
item number 63
15 Minute SEO List
"Similarly to wine, older sites are respected more. The idea is that an old, established site is more trustworthy (they have been around and are here to stay) than a new site that has just poped up and might soon disappear."

then see here:
The Age of a Domain Name
"Two things that are considered in the age of a domain name are:
The age of the website
The length of time a domain has been registered"

Thank you very much

Your Welcome.

I do quite a bit of SERPs analysis and I do notice that as a general statistic sites that rank well for any given SERP generally have a domain that is registered for a long period.

That is not to say that this is the reason for them ranking higher and there are often sites with a 1 year registration ranking higher than a site with 10 years registration.

From a purely statistical analysis it would suggest that the lenght of registration would be a parameter that is considered. If you put a bit of thought and common sense into the statistical data (which can be very misleading if not interpreted correctly) you would see the commmercial sense in registering a high ranking domain for a longer period. Its commercail protection and is probably why you see this in a higher mode average the more competetive a SERP you are looking at.

Whilst I think that the length of registration may have somne very small effect on ranking I think it is probably immeasureably small and so insignificant it is not worth considering.
The relative costs involved are also very small so register for a couple of years and forget about it.

I have seen absolutely NO correlation between the length of the registration period and SERPS. Seems like it would be easy to test though, and kick that rumor to sleep... where it needs to be.

but i think it`s not an important parameter for ranking.

Brilliant statement,Thank you.