Sentence examples for was at least from inspiring English sources

The phrase "was at least" is grammatically correct and can be used in written English.
It is typically used to compare something to a minimum or expected level. Example: "The presentation was at least an hour long." In this sentence, "at least" is used to indicate that the presentation was at least an hour, but it may have been longer. Another example: "The new phone has at least 128 GB of storage." In this sentence, "at least" is used to indicate that the phone has a minimum of 128 GB, but it may have more.