2020

This number is a composite.

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Our current calendar year, 2020, may be computed with the same "formula" by using any of the one-digit primes (2, 3, 5 and 7), one at a time, as shown: 2020 = {[(dddd-dd)*dd]/(d+d)+dd-d}/(d+d+d) = {[(2222-22)*22]/(2+2)+22-2}/(2+2+2) = {[(3333-33)*33]/(3+3)+33-3}/(3+3+3) = {[(5555-55)*55]/(5+5)+55-5}/(5+5+5) = {[(7777-77)*77]/(7+7)+77-7}/(7+7+7). [Rivera]

Submitted: 2020-05-27 10:48:15; Last Modified: 2020-05-27 19:21:27.