Burt Kaliski Jr. (@modulomathy) 3/13/12 7:42 AM #math trivia for #March13: #73 as a modulus gives square roots to -1. Solve x^2+1 = 0 (mod 73) where x is an integer between 0 and 72. One way to find the square root is by trial and error, looking for the smallest integer congruent to 72 … Continue reading