long hundred vs large integer

long hundred and large integer both are nouns.

Word	Noun	Adjective	Verb	Adverb
long hundred	Yes	No	No	No
large integer	Yes	No	No	No

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

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