strange results and absolute number

[YA_10963798]

what does this result mean? why there's vector i next the numbers? and how to find the absolute value . I just need all the values to be positive in p function 

[ttokoro · Accepted solution]

[YA_10963798]

thank you 

[YA_10963798]

Do you have any idea why I get zero here 

[ttokoro]

Prime 10 shows.

[YA_10963798]

I solved that , thank you