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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.
Identify the parts of the problem. An exponent is written to the top right of the base, which is the number or variable that is raised to the power of the exponent. Fraction exponents are written in the same format. The top number of a fraction is the numerator and the bottom number is the denominator.Multiply the base by itself the number of times indicated by the numerator. For instance, if you have 64 to the 2/3 power, multiply 64 times 64, two times, as indicated by the numerator, to get 4096.Take the root of the base as indicated by the denominator of the fraction exponent. For instance, if you have 64 to the 2/3 power, you would multiply 64 times 64 to get 4096.Then you would take the third root (or cube root) of 4096 to find the answer to the problem. In other words, you must find out what number times itself three times equals 4096.or instance, if you have 64 to the 2/3 power, you would multiply 64 times 64 to get 4096. Then you would take the third root (or cube root) of 4096 to find the answer to the problem. In other words, you must find out what number times itself three times equals 4096.