"As far as I recall" is a commonly used phrase to express one's memory or recollection of a past event. However, there are other synonyms that can be used in place of this phrase. One such synonym is "to the best of my knowledge," which means that the speaker is expressing what they know or believe to be true. Another synonym for "as far as I recall" is "as far as I can remember," which implies that the speaker's memory of the past event may not be entirely accurate. "From what I can gather" is another synonym that can be used to express what the speaker has been able to learn or gather about a past event. Overall, these synonyms allow speakers to express their memory or knowledge of a situation in a variety of ways.