乱数 らんすう発生 はっせい ではありませんでした
ransūhasseikidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 乱数発生器

1. Was not a random number generator.; Was not a random number generator, politely.

Past/Perfective
Negative
Polite
Formal Register
Computing