305 (number) explained

305 is the natural number following 304 and preceding 306.

In mathematics

• 305 is an odd composite number with two prime factors.^[1]
• 305 is the convolution of the first 7 primes with themselves.
• 305 is the fifth hexagonal prism number which is defined by (n+1)(3n²+3n+1).^[2]
• 305 is the hypotenuse of two Pythagorean triples. 305²=207²+224²=136²+273².^{[3] [4]}

Other fields

• The calendar years 305 AD and 305 BC.
• 305 is the number for several highways across the countries of Canada, China, India, Japan, the Philippines, and the United States.

Notes and References

1. Web site: Facts about the integer. mathworld.wolfram.com.
2. (n + 1)*(3*n^2 + 3*n + 1).
3. Web site: Pythagorean triples. mathworld.wolfram.com.
4. Web site: Systems of Pythagorean Triples. www.whitman.edu. Christopher. Tobin-Campbell.