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Largest known prime number. As of January 2017, the largest known prime number is 274,207,281 â 1, a number with 22,338,618 digits. It was found in 2016 by the Great Internet Mersenne Prime Search (GIMPS). Plot of the number of digits in largest known prime by year, since the electronic computer. Note that the vertical scale is logarithmic. The red line is the exponential curve of best fit: y = exp(0.187394 t - 360.527), where t is in years.
(a) A prime 'p' is either relatively prime to a number 'n' or divided it. (b) A product is divisible by a prime 'p' only when 'p' divides one of the factors. Yes all prime numbers are odd, but only even prime number is 2. Since every other even number can be divide by a 2. Prime numbers are a special category of natural numbers or positive integers which are exactly divisible by 1 and the number itself. So, a prime number has exactly two divisors. Prime number is a number which is greater than 1 and which can be efficiently divided by 1 and by itself not by any other number. It is also a whole number. prime number composite. Theorem: Every compositely number could be factored into prime factors and each of these is unique in nature.