No, "np" is not a countable noun.
It is a countable noun because we can count computers
Yes, prime factorization is not an NP-complete problem. It is in fact in the complexity class NP, but it is not known to be NP-complete.
Proving that a problem is NP-complete involves demonstrating that it is both in the NP complexity class and that it is at least as hard as any other problem in NP. This typically involves reducing a known NP-complete problem to the problem in question, showing that a solution to the problem in question can be used to solve the known NP-complete problem efficiently.
Yes, the clique problem is NP-complete.
Yes, the partition problem is NP-complete.
The noun 'hill' is a countable noun. The plural form is 'hills'.
Shark is a countable noun.
Prawn - prawns is the plural - is a countable noun
Transport is both countable and uncountable as a noun.
Yes, property is a countable noun.
The noun 'animal' is a countable noun. The plural form is animals.
Yes, the noun 'marriage' is a countable noun. The plural noun is marriages.
The noun meeting is a countable noun; for example: We have a meeting this afternoon. We've had two meetings already this week.
The noun 'desert' is a countable noun; the plural form is deserts.
The noun analysis is a countable noun; the plural form is analyses.
The noun utensil is a countable noun; one utensil, many utensils.
The noun media is the plural form of the noun medium, it is a countable noun.