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680th Bombardment Squadron
68 may refer to: * 68 (number) * one of the years 68 BC, AD 68, 1968, 2068 * 68 Publishers, a Czech-Canadian publishing firm * '68 (band), an American rock band * '68 (comic book) a comic book series from Image Comics See also *List of highways numbered 68 {{Numberdis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
68 (number)
68 (sixty-eight) is the natural number following 67 (number), 67 and preceding 69 (number), 69. It is an Parity (mathematics), even number. In mathematics 68 is a Perrin number. It is the largest known number to be the sum of two primes in exactly two different ways: 68 = 7 + 61 = 31 + 37. All higher even numbers that have been checked are the sum of three or more pairs of primes; the conjecture that 68 is the largest number with this property is closely related to the Goldbach conjecture and, like it, remains unproven. Because of the factorization of 68 as , a 68-sided regular polygon may be constructed with compass and straightedge. There are exactly 68 10-bit binary numbers in which each bit has an adjacent bit with the same value, exactly 68 combinatorially distinct Point-set triangulation, triangulations of a given triangle with four points interior to it, and exactly 68 Partially ordered set#Intervals, intervals in the Tamari lattic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
