1923

This number is a composite.

+ The smallest odd-emirpimes (after 15) that can be expressed as the sum of first n odd-emirpimes, i.e., (15 + 39 + 51 + ... + 185 + 187), (case n=15). [Bajpai]

+ In 1923, English mathematicians Hardy and Littlewood figured out how you can estimate how many twin primes there should be. [Veritasium]

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