what does google Pagerank of -1 mean?

Hi when i check this tool,
http://www.findmatch.org/prchecker/pagerank_update.php
for 2 of my sites
this tool says PR -1

WHAT is -1???

i see 0 in some sites, 3, 5 in some sites

but i just saw -1 for 2 of my sites/?? is that really bad?

please advise

 

From what it looks like a -1 on this tool means that data center is actually down. I see mostly fours though.

 

Maybe the data center is Down?

I got the same reading for my domain

 

thanks guys,
thats strange then
cuz i got all -1 for 2 of my sites

 

maybe your server is going to down

 

It means you have to work that much harder to get above zero. Sort of like going negative in the game show Jeopardy.

 

There's no way to be below zero

 

I think the data center may be down

 

Pagerank values is between 0-10 so -1 is not your pagerank value, It's because the Google DC you are trying to check the Pagerank value on is down.

 

i think it means that datacenter is not responding

 

Either data center is down, or Google was twiking the formula and made a mistake.