forty vs large integer

forty and large integer both are nouns.

Word	Noun	Adjective	Verb	Adverb
forty	Yes	Yes	No	No
large integer	Yes	No	No	No

As nouns, large integer is a hypernym of forty; that is, large integer is a word with a broader meaning than forty:

forty (noun)	large integer (noun)
the cardinal number that is the product of ten and four	an integer equal to or greater than ten

forty (adjective)	large integer (adjective)
being ten more than thirty