Burt Kaliski Jr. (@modulomathy) 3/20/12 11:06 AM #math trivia for #March20: #80 has the form x^4-1 for x > 2 so must have at least three nontrivial divisors. What are they, and why three? The nontrivial divisors of 80 (those other than 80 or 1) are 2, 4, 5. 8, 10, 16, 20, and 40. … Continue reading →